Brand: Stack Inc
This compact shift light is designed to connect easily to your Stack tachometer (ST200 Clubman, ST200C Classic, ST400 Professional, ST400C Classic, and ST901096 Chronotronic). When the engine reaches the RPM limit set on your tach, the tach will turn on the light. ST400 / ST400C models also use this light to indicate when the tach is recording.
The Panel model is designed to mount in a 1/2" diameter hole in your dash panel. This style is preferred in formula cars and sports racers, where there is no horizontal "dashboard" between the instrument panel and the cowl. Red lens shown in photo.
Note: This is an indicator light only. It does not have any circuitry of its own and will not function without a Stack tachometer.