Specification: Material: ABS Working temperature: 0-40 Celsius Trigger point: High voltage coil No. 1 spark plug Input voltage: 12V Speed: 200-10,000 r/min Color: Black Size: As shown in pictures Features: The handle is ergonomically designed with comfortable press keys, providing a great pressing feel and easy operation. High-quality construction ensures durability. This timing device operates at 12V and is suitable for cars, motorcycles, and all gasoline engines with two-stroke or four-stroke configurations. It can intuitively test the ignition timing scale on the engine flywheel or belt pulley for proper adjustment. Capable of detecting the automotive knock suppression control system and vacuum advance angle control system, allowing the advance angle to change with speed variations. Enables resetting of ignition timing after normal engine wear, regular replacement of timing belt and pulley, or reduced cylinder pressure. Ignition timing directly affects engine performance. Incorrect timing may result in engine start-up failure. If timing is too early, the engine may produce a metallic knocking sound, increased starting resistance, difficult rotation, reduced power, unstable idling, and vibration. If timing is too late, it may cause hard starting, insufficient power, increased fuel consumption, and accelerated engine wear. Attention: Power supply is 12V; connect red to positive and black to negative. Ensure correct polarity. The high-voltage wire induction clamp must be attached to the high-voltage line of the cylinder, with the arrow on the clamp pointing toward the spark plug for proper operation. Package includes only the items listed; all other products are not included. Package Included: 1 Set x Ignition Timing Device