Feature: 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 LightMaterial: ABSInput Voltage: 12VSpeed: 200-10000RPM Working Temperature: 0-40 °C Trigger Point: No. 1 cylinder high pressure spark plug Application: Suitable for cars, motorcycles, boats. Package List: 1 x Engine Timing Light1 x Cable1 x Manual