BLACK UNIVERSAL DIGITAL SHIFT LIGHT Lite BLUE LED TACHOMETER RPM 4/6/8 Cylinders

One Brand New Digital Pro Shift Lamp/light with blue LED. Brand new in its packaging with instructions, etc. This pro shift light no need to use Pill kit and you can adjust the signal with knob. Pro Shift Light Features: 1. Lens material: plastic; 2. Housing material: iron; 3. Colors: Black 4. LED blue light; 5. Connect 12 volts,the blue wire should be connected to the motor signal line; 6. A potentiometer is on the back of the lamp; 7. Adjustable set value; 8. Set alarm separately. 9.Can you for 4 6 8 cylinders. I can Send you instruction list before you purchase it. please contact with me A Auto shift Lamp light is a warning lamp fitted to vehicles in order to indicate to the driver that maximum RPM has almost been reached. Ideally a shift lamp will illuminate at the engine speed beyond that which delivers the maximum BHP such that the BHP before and after shifting is the same. Accelerating the engine beyond this point is not conducive to rapid acceleration. In use a shift light allows the driver to judge the exact point that a gear change should be carried out without having to glance down at the tachometer. This also increases safety for the driver by keeping his focus on the track at all times.