Features: 1.Professional: Detachable clamp on inductive pickup, easy and secure to connect. Solid state burnout proof polarity with automotive reverse. 2.Function: The engine timing light is used to measure and set initial timing, check and measure centrifugal advance, and measure vacuum advance. 3.Sensor Clips: Red and black sensor clip designed to distinguish bracket and negative poles, handles cover with high quality rubber to ensure safety. 4.Ergonomic Grip Design: The ergonomically designed handle makes you feel more comfortable. The button feels good, facilitates the operation. 5.Operation: Design to retiming your car's ignition to get the best performance that you can. Easily operate on 12V ignition systems. Specification: Item Type: Engine Timing Light_x000D_ Material: ABS_x000D_ Input Voltage: 12V_x000D_ Speed: 200-10000RPM_x000D_ Working Temperature: 0-40 C_x000D_ Trigger Point: No. 1 cylinder high pressure spark plug_x000D_ Application: Suitable for cars, motorcycles, boats