Easy-to-replace battery: This inductive tachometer is safe and reliable, with an easy-to-replace battery and long service life. Dual-button with clip: Press the RST button to reset. The MODE button can be used to adjust the speed mode. The instrument panel features a large LCD screen and a built-in battery for safety and reliability. System data reset function: Automatic zeroing function; the hour counter can display up to 10,000 hours before resetting; the tachometer can display up to 99,999 rpm. Inductive design: Measures RPM by placing it near the engine spark plug wires; automatically turns off when not in use and automatically wakes up when needed. Wide range of applications: Compatible with all two-stroke or four-stroke gasoline engines, especially compatible with vehicle engines with RPMs above 25,000. Measurement RPM range: 100 RPM to 30,000 RPM. Measurement method: 1. Place the handheld tachometer 3-5 cm away from the spark plug wires for testing. 2. Insert one end of the electronic wire into the hole in the electronic meter body and fix it to the spark plug wire sheath with a metal clip for induction measurement. Product Features: 1. High-quality instrument and large-size LCD screen 2. Compatible with car engines with speeds above 25,000 rpm Specifications: Material: ABS Size: 46*57 (mm) Black Function: Digital engine tachometer Package List 1 * Digital tachometer ladacea