the JX1002 engine hour meter a self-powered,induction LCD hour meter,widely ... is used to record working hours for testing engine R Speed with the Gasoline engine, ATV, Motorbike, Motorboat.2.Signal input 1. Signal ... hours, resolution of 0.1 hours.2. Display testing engine R-speed, error ± 5 r / min.3. Warning and flashing function. 4. Warning ...