The handle is ergonomically designed with comfortable press keys, great Press feeling and easy operation. And the high quality makes it be worn hardly. This timing device with 12V working voltage is suitable for cars, motorcycles and all gasoline engines of two strokes or four strokes. Capable of testing the ignition timing scale on the engine flywheel or belt pulley intuitively to adjust appropriately. Able to detect the automotive knock suppression control system and vacuum advance angle control system, change its advance angle with the speed change. It is able to reset the ignition timing under the normal wear of the engine for a long time, the regular replacement of timing belt and belt pulley, the decrease of cylinder pressure. Special Features: Timing Item Weight: 0.5kg Input voltage: 12V Trigger point: High voltage coil No. 1 spark plug Speed: 200-10000r/min Working temperature: 0-40 Celsius Ignition timing directly affects the normal operation of the engine. It will cause the engine start-up failure if the worst come to the worst. If too early, the engine speeds up and produces "GA, GA" like metal knocking with large starting resistance, difficult engine rotation, power reduction and idling instability, trembling. If too late, it will cause difficult start-up or insufficient power, thus accelerated oil consumption and engine abrasion. Color: red, black Material:ABS size:Size of induction: about 10 mm/ 0.39 inches Package Contents: 1 x Ignition Timing Device Attention: The power supply is 12V with red connecting to positive and black to negative. Don't get it wrong. The high voltage wire induction clamp is clamped on the high voltage line of cylinder with the arrow on the induction clamp pointing to the direction of the spark plug for normal working. Only the above package content, other products are not included. Note: Light shooting 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. Specification: Model: TL-122 Input voltage: 12V Trigger point: high volt coil of No.1 spark plug Speed: up to 10000rpm Working temperature: 0-40C Note:The power supply 12V red positive black negative folders do not reversed, high-voltage induction clip, clip on a cylinder power lines, induction clip on the arrow pointing to the direction to normal use. Package included: 1x Ignition Timing gun