Best Alternating Flasher Relays

What are the best alternating flasher relays? I’m here to help you find the perfect one for your needs!

Alternating flasher relays are essential tools for creating eye-catching light patterns. Whether for emergency vehicles, safety beacons, or custom lighting, these devices enhance visibility and grab attention. They are versatile, working with LEDs, incandescent bulbs, and more.

From compact modules to heavy-duty relays, there’s a perfect fit for every need. Adjustable timers, waterproof designs, and easy installation make them user-friendly. These relays are built to last, ensuring reliable performance in any condition.

Discover the best alternating flasher relays to elevate your lighting projects. Let’s explore the top options that combine functionality and durability for maximum impact.

List of Top 10 Alternating Flasher Relays

Title	Best For	Price
DC 4.5-30V 10A Dual Output Alternating Flasher Module	This dual output alternating flasher module is perfect for anyone needing to control LED lights, warning signs, or safety beacons. It’s easy to adjust and works with various power sources, making it ideal for DIY projects or professional setups.	View on Amazon (paid link)
URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module,Dual Channels with Independent 0.01-15S Timers for Wig-Wag Warning Lights,Emergency Beacons,Automotive Signal Control-D4	This URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module is perfect for anyone needing customizable, high-visibility warning lights. It’s ideal for emergency vehicles, motorcycles, and industrial signaling where clear alternating patterns are a must.	View on Amazon (paid link)
AC 100-240V 2A Dual Output Alternating Flasher Module	This dual output alternating flasher module is perfect for anyone needing to control flashing lights in a simple and practical way. It’s ideal for resistive and slightly inductive loads, like lightbulbs, hazard lights, or safety beacons.	View on Amazon (paid link)
Stop-Alert WigWagger 72 Electronic Wig Wag Alternating Flasher Relay – Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Compatible 12-24V	This Stop-Alert WigWagger is perfect for anyone who wants to boost their vehicle’s visibility and alert others on the road. It’s ideal for those who need extra warning power for their car, truck, or motorcycle.	View on Amazon (paid link)
Stop-Alert New X2 Wig Wagger Alternating Flasher Relay – Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Universal Wig Wag Strobe Flasher -12-24V	This Stop-Alert New X2 Wig Wagger is perfect for anyone needing a reliable emergency warning system. Whether you drive a car, truck, or motorcycle, this waterproof, universal kit ensures maximum visibility and safety on the road.	View on Amazon (paid link)
Briidea Electronic Alternating Flasher Kit Relay, 36 Flashing Patterns by a Single Botton Quickly Change, 10 Amp 12-24VDC, Suitable for Car, Motorcycle Retrofit Headlights or Any Lamp	This flasher kit is perfect for car and motorcycle lovers who want to upgrade their lights. It’s also great for anyone needing quick, easy flashing modes for safety or style.	View on Amazon (paid link)
Stop-Alert WigWagger 240 Headlight Wig Wag Alternating Flasher Electronic Relay LED Xenon Halogen HID Incandescent – Emergency Police Ambulance Trucks 10 AMP 240W 12-24V 150 FPM	This Stop-Alert WigWagger 240 is perfect for emergency vehicles like police cars and ambulances, as well as any truck driver who wants to increase visibility and grab attention on the road. Its fast flashing pattern ensures you’ll stand out and be seen by everyone.	View on Amazon (paid link)
Stop-Alert FastWagger 240w – Headlight Safety alternating flasher module electronic Wig Wag strobe controller relay – LED Incandescent Xenon Halogen HID Car Police Emergency Trucks 10A 12-24V 250FPM	This Stop-Alert FastWagger is perfect for anyone who needs to grab attention and increase visibility on the road. If you drive a police car, emergency vehicle, truck, or any vehicle where safety and immediate awareness are crucial, this module will make your lights flash incredibly fast to alert everyone around.	View on Amazon (paid link)
MFC PRO 12V 3-Pin Electronic LED Flasher Relay fix for LED Turnlight That Fixes Hyper Flash Problems FLR-MFC2	This 3-pin LED flasher relay is perfect for motorcycle owners who want to fix hyper flash problems with their LED turn signals. It’s easy to install and works with many North American sportbikes.	View on Amazon (paid link)
CEC Industries EF33RL 12V Heavy Duty 3-Pin Electronic Flasher Relay for LED and Incandescent Bulbs (1-Pack)	This heavy-duty flasher relay is perfect for anyone looking to upgrade their vehicle’s turn signals. It’s ideal for DIY enthusiasts and mechanics who want a reliable, self-adjusting solution for both LED and incandescent bulbs, ensuring proper flashing speed and indicator light function.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Alternating Flasher Relays in our expert-curated guide. Each product is thoroughly reviewed for performance, features, and value, ensuring you find the perfect fit for your needs. Whether for safety, visibility, or reliability, this guide makes your choice simple and confident.

1. DC 4.5-30V 10A Dual Output Alternating Flasher Module

The DC 4.5-30V 10A Dual Output Alternating Flasher Module is a practical tool for creating blinking lights. It has two adjustable outputs that can be set to flash at different times.

You can use this module for LED lamps, warning signs, and safety beacons. The maximum current for each output is 10 amps. It can handle loads up to 300 watts at 30V and 120 watts at 12V.

Adjust the flashing times easily with the 25-turn potentiometers. Each output has an LED indicator for clear status. The compact design allows for simple mounting on walls or boards.

Pros	Cons
Adjustable blinking for dual outputs. Powers up to 10A per output. Simple to set with potentiometers. LEDs show output status. Easy to mount and connect.	No memory function – settings reset after power loss. Limited load types – not suitable for highly inductive loads. Manual adjustment only – no remote or automated control options.

Perfect For:

This dual output alternating flasher module is perfect for anyone needing to control LED lights, warning signs, or safety beacons. It’s easy to adjust and works with various power sources, making it ideal for DIY projects or professional setups.

Ready to Purchase?

View Price on Amazon (paid link)

2. URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module,Dual Channels with Independent 0.01-15S Timers for Wig-Wag Warning Lights,Emergency Beacons,Automotive Signal Control-D4

URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module,Dual Channels with Independent 0.01-15S Timers for Wig-Wag Warning Lights,Emergency Beacons,Automotive Signal Control-D4

Command the flash with the URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module. This dual-channel powerhouse lets you set independent flashing times from 0.01 to 15 seconds. Create custom wig-wag patterns with ease.

Handle heavy-duty loads up to 10 Amps per channel. Its wide voltage range works for 12V cars and 24V trucks. Installation is a breeze with color-coded wires and a clear diagram.

This industrial-grade module is built to last. It’s perfect for emergency lights and automotive signaling.

Pros	Cons
Adjustable timers for custom flashing patterns. Heavy-duty design supports up to 10 Amps per channel. Easy installation with pre-wired connections. Ideal for emergency and industrial signaling needs. Sturdy construction ensures durability in tough conditions.	Limited timer range. No built-in power switch.

Perfect For:

This URANT DC 4.5-30V 10A Adjustable Alternating Flasher Relay Module is perfect for anyone needing customizable, high-visibility warning lights. It’s ideal for emergency vehicles, motorcycles, and industrial signaling where clear alternating patterns are a must.

Ready to Purchase?

View Price on Amazon (paid link)

3. AC 100-240V 2A Dual Output Alternating Flasher Module

This dual output alternating flasher module is simple and practical. It works with AC 100-240V and handles up to 2A per output. Use it for lights, signs, or beacons with ease.

Adjust ON and OFF times separately for each output. It comes in a compact case with LED indicators and screw mounting holes for quick setup.

Pros	Cons
Control two outputs independently. Adjust blink timing easily. Works with many lights. Simple to install and use.	Not for DC lamps; only AC. No voltage change; input equals output.

Perfect For:

This dual output alternating flasher module is perfect for anyone needing to control flashing lights in a simple and practical way. It’s ideal for resistive and slightly inductive loads, like lightbulbs, hazard lights, or safety beacons.

Ready to Purchase?

View Price on Amazon (paid link)

4. Stop-Alert WigWagger 72 Electronic Wig Wag Alternating Flasher Relay – Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Compatible 12-24V

Stop-Alert WigWagger 72 Electronic Wig Wag Alternating Flasher Relay - Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Compatible 12-24V

The Stop-Alert WigWagger 72 is an electronic flasher relay for emergency vehicles. It makes your car, truck, or motorcycle more visible. This helps to keep you safe on the road.

This product features powerful wig wag flash patterns to grab attention. It is also waterproof, protecting it from short circuits.

Installation is easy with the included instruction kit and 3M adhesive tape. However, professional installation is recommended for the best results.

Pros	Cons
Boosts visibility, keeping your vehicle safe and noticeable. Tough, waterproof design prevents short circuits in any weather. Easy install with 3M tape—professional setup required for reliability. Powerful 72W load works with 12V-24V systems for versatile use.	Professional installation is a must. May not be suitable for all light types. Requires careful wiring for best results.

Perfect For:

This Stop-Alert WigWagger is perfect for anyone who wants to boost their vehicle’s visibility and alert others on the road. It’s ideal for those who need extra warning power for their car, truck, or motorcycle.

Ready to Purchase?

View Price on Amazon (paid link)

5. Stop-Alert New X2 Wig Wagger Alternating Flasher Relay – Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Universal Wig Wag Strobe Flasher -12-24V

Stop-Alert New X2 Wig Wagger Alternating Flasher Relay - Waterproof Universal Emergency Police Ambulance Car Controller LED Strobe Light Box Kit- Universal Wig Wag Strobe Flasher -12-24V

Grab attention with the Stop-Alert New X2 Wig Wagger. This universal controller makes your vehicle instantly visible. It’s designed to keep you safe on the road.

The Wig Wagger features tough circuits for powerful lighting. It’s waterproof and easy to install for maximum impact.

Pros	Cons
Increases visibility for emergency situations. Heavy duty design withstands tough conditions. Alternating flash pattern captures attention effectively. Waterproof to prevent electrical issues. Simple installation with included instructions and tape.	Professional installation is a must, not a DIY job. No plug-and-play option, requires extra wiring work. Limited to 12-24V systems, not universal for all vehicles.

Perfect For:

This Stop-Alert New X2 Wig Wagger is perfect for anyone needing a reliable emergency warning system. Whether you drive a car, truck, or motorcycle, this waterproof, universal kit ensures maximum visibility and safety on the road.

Ready to Purchase?

View Price on Amazon (paid link)

6. Briidea Electronic Alternating Flasher Kit Relay, 36 Flashing Patterns by a Single Botton Quickly Change, 10 Amp 12-24VDC, Suitable for Car, Motorcycle Retrofit Headlights or Any Lamp

Briidea Electronic Alternating Flasher Kit Relay, 36 Flashing Patterns by a Single Botton Quickly Change, 10 Amp 12-24VDC, Suitable for Car, Motorcycle Retrofit Headlights or Any Lamp

The Briidea Electronic Alternating Flasher Kit Relay is perfect for your vehicle. It has 36 flashing patterns that you can change quickly. This kit works well with cars and motorcycles.

You can switch modes easily with just one button. The relay handles up to 10 amps, making it safe and reliable.

Installation is simple and requires straightforward wiring. Plus, the flame-retardant waterproof design ensures it lasts in any weather.

Pros	Cons
36 Flashing Patterns for ultimate customization and visibility. Single-Button Control for quick and easy mode switching. 10A High-Current Handling ensures safety and reliability. Waterproof & Flame-Retardant design for all-weather durability.	No remote control for easy mode switching from a distance. Limited to 10A, may not suit very high-power lights. Single button might be less intuitive for some users.

Perfect For:

This flasher kit is perfect for car and motorcycle lovers who want to upgrade their lights. It’s also great for anyone needing quick, easy flashing modes for safety or style.

Ready to Purchase?

View Price on Amazon (paid link)

7. Stop-Alert WigWagger 240 Headlight Wig Wag Alternating Flasher Electronic Relay LED Xenon Halogen HID Incandescent – Emergency Police Ambulance Trucks 10 AMP 240W 12-24V 150 FPM

Stop-Alert WigWagger 240 Headlight Wig Wag Alternating Flasher Electronic Relay LED Xenon Halogen HID Incandescent - Emergency Police Ambulance Trucks 10 AMP 240W 12-24V 150 FPM

The Stop-Alert WigWagger 240 is an advanced emergency light flasher designed to increase your vehicle’s visibility. It features a 150 flashes per minute rate that ensures everyone around you is alerted.

Built with heavy-duty circuits, this unit supports up to 72W load and is compatible with both 12V and 24V systems. Its waterproof design protects against short circuits, making it suitable for various vehicle types.

Installation is easy with the included instruction kit. However, professional installation is required for optimal performance. This product fits both LED and incandescent lamps. It’s a reliable choice for emergency vehicles.

Pros	Cons
Boosts visibility with 150 flashes per minute. Powers heavy-duty lights up to 72W. Creates a standout “wig wag” flash. Protects against water with a waterproof design. Fits both LED and incandescent lamps.	Professional installation is a must, adding extra cost and time. No DIY option for those who prefer to install it themselves. High flash rate might be too intense for some users.

Perfect For:

This Stop-Alert WigWagger 240 is perfect for emergency vehicles like police cars and ambulances, as well as any truck driver who wants to increase visibility and grab attention on the road. Its fast flashing pattern ensures you’ll stand out and be seen by everyone.

Ready to Purchase?

View Price on Amazon (paid link)

8. Stop-Alert FastWagger 240w – Headlight Safety alternating flasher module electronic Wig Wag strobe controller relay – LED Incandescent Xenon Halogen HID Car Police Emergency Trucks 10A 12-24V 250FPM

Stop-Alert FastWagger 240w - Headlight Safety alternating flasher module electronic Wig Wag strobe controller relay - LED Incandescent Xenon Halogen HID Car Police Emergency Trucks 10A 12-24V 250FPM

The Stop-Alert FastWagger 240w boosts your vehicle’s visibility. It flashes 250 times per minute to alert everyone around you. Perfect for emergency or warning needs.

Its heavy-duty design handles up to 240W and works with 12V to 24V systems. The waterproof build prevents short circuits, ensuring safety.

Installation is simple with the included instruction kit and 3M adhesive tape. Professional installation is required for best results. Stand out on the road with fast, alternating flash patterns.

Pros	Cons
250 flashes per minute for maximum visibility and safety. Heavy-duty 240W load handles LED, incandescent, and more. Waterproof design ensures reliable performance in all conditions. Fastest alternating patterns make you stand out on the road.	Professional installation is a must. Waterproof design might not cover all situations. Fast flash patterns could be distracting to some.

Perfect For:

This Stop-Alert FastWagger is perfect for anyone who needs to grab attention and increase visibility on the road. If you drive a police car, emergency vehicle, truck, or any vehicle where safety and immediate awareness are crucial, this module will make your lights flash incredibly fast to alert everyone around.

Ready to Purchase?

View Price on Amazon (paid link)

9. MFC PRO 12V 3-Pin Electronic LED Flasher Relay fix for LED Turnlight That Fixes Hyper Flash Problems FLR-MFC2

The MFC PRO 12V 3-Pin Electronic LED Flasher Relay is designed to fix hyper flash problems when using LED turn signals. It is easy to install and fits most North American sportbikes.

This relay works at DC 12V and operates at a frequency of 1.4-1.6HZ. It solves issues like fast or non-flashing lights. Make sure to connect the wires correctly for it to work properly.

Pros	Cons
Fixes hyper flash and other LED issues. Easy to install and replace. Wide compatibility with many sportbikes. Built with a chip for smart operation. Compact size for easy fitting.	No batteries included, so you’ll need to buy them separately. Wires must match exactly, or it won’t work properly. Size compatibility is crucial; measure before buying to avoid issues.

Perfect For:

This 3-pin LED flasher relay is perfect for motorcycle owners who want to fix hyper flash problems with their LED turn signals. It’s easy to install and works with many North American sportbikes.

Ready to Purchase?

View Price on Amazon (paid link)

10. CEC Industries EF33RL 12V Heavy Duty 3-Pin Electronic Flasher Relay for LED and Incandescent Bulbs (1-Pack)

The CEC Industries EF33RL is a heavy-duty electronic flasher relay designed for 12V systems. It works with both LED and incandescent bulbs, making it versatile. Its 3-prong, round plastic design ensures durability and reliability.

This flasher relay is DOT compliant and meets SAE standards, ensuring quality. It has a variable load range of 0.1A to 25A, adjusting to your lamp’s needs. With 600 life hours, it’s built to last and perform well.

Use it to prevent rapid flashing turn signals or as a panel indicator for cars and motorcycles. Its self-adjusting feature ensures smooth operation, making it a reliable choice for your vehicle.

Pros	Cons
Reliable OE quality for your vehicle. Works with LED and incandescent bulbs. Prevents rapid flashing turn signals. Durable for long-lasting performance.	Limited to 12V systems, not suitable for higher voltage setups. Plastic body may not withstand extreme heat or impact. No advanced features like programmability or customizable settings.

Perfect For:

This heavy-duty flasher relay is perfect for anyone looking to upgrade their vehicle’s turn signals. It’s ideal for DIY enthusiasts and mechanics who want a reliable, self-adjusting solution for both LED and incandescent bulbs, ensuring proper flashing speed and indicator light function.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Alternating flasher relays make lights blink in eye-catching patterns. They are great for safety, emergencies, or custom projects.

Buying Guide:

Voltage and Current:
Choose a relay that matches your system’s voltage (like 12V or 24V) and handles the current your lights need.
Flashing Patterns:
Look for relays with adjustable timers or multiple patterns to create the right effect for your needs.
Compatibility:
Ensure the relay works with your light type, such as LEDs, incandescent bulbs, or halogen lights.
Durability:
Pick a waterproof and heavy-duty relay for outdoor or tough conditions.
Installation:
Opt for relays with easy wiring, clear instructions, or professional installation options for hassle-free setup.
Load Capacity:
Check the relay’s wattage or amp limit to ensure it can handle your lights without overheating.
Size and Design:
Consider compact or mounting-friendly designs if space is limited.
Safety Features:
Look for relays with short-circuit protection or flame-retardant materials for added safety.