Inductive Tachometer Track Oil Change Hour Meter Backlit Digital Tach Hour Meter for 2 or 4 stroke gasoline engine maintenance, maintenance timing and RPM detection, easy to install and operate. [Scene Application]--Induction tachometer hour meter for maintenance of any 2 or 4 stroke gasoline engine, maintenance timing (1-200H can be set) and speed detection (MAX RPM25000) [Housekeeper Service]--Large font backlight, speeding flash alarm, for your security. Waterproof design, light rain is not afraid, follow you wild (IP65) [Safety Guarantee]--The anti-seismic design of the backlight timer can also display smoothly on the pit road, and always pay attention to the health of the engine pulse beat. [Designed for you]--Battery replaceable (CR2032), data is not lost. Velcro installation, simple press. Damping buttons for easy setup. [After sale guarantee]--Turn off, backlight is optional Reliable shopping is not worried, product problems are unconditionally