100HD-M unit is designed to handle up to (4) tail light bulbs - for newer BMWs (EVO equipped), Yamaha (ABS equipped) and newer Harleys.

100HD-M has a built-in ballast to allow continuity during the flash mode. It has a high-side interrupt circuit to allow flashing of the bright brake filaments. This makes it easy with just a single wire splice.

100HD-M unit fits in the tail section or under the seat.

When you apply the brakes the brake light will modulate rapidly at first then slow down to a solid ON over a period of (4) seconds.

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Kisan Brake Light Modulator - Part No. 3953