This product can adjustable resistors and has a test light signal function. It can post-processing exhaust temperature sensors, liquid level sensors, fuel temperature sensors, liquid temperature sensors, water temperature sensors, environmental temperature sensors, as well as intake pressure and temperature sensors. The test light function can quickly determine the pulse signal of the fuel injector and the crankshaft position sensor signal, which is a useful tool to quickly troubleshoot faults. Hign-concerned Chemical:None Test lamp parallel test, for example: injector pulse Signal, crank signal, synchronization signal simulation, for example: Water temperature sensor Temperature sensor, etc., level sensor Color: As Shown Material: plastic Package Contents: 1 * Car sensor signal simulator Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.