... -5001 MODEL, a 5-digit LCD display TACHOMETER/hour meter, ultra-thin, records the actual running time of engine, especially for motorcycles ... disturbance and optical isolation. It has novel structure, is smart, ultra-small, ultra-thin, stable performance, reliable, high precision, long life and easy ... us at any time.Mounting Size: GY-5001 LCD Display Ultra-thin Generator Hour Meter