... in the ChinaGY-5001 MODEL, a 5-digit LCD display TACHOMETER/hour meter, ultra-thin, records ... disturbance and optical isolation. It has novel structure, is smart, ultra-small, ultra-thin, stable performance, ... frequency showing instruments and equipment .(when it is working, displays hourglass icon, the battery can be used for ... time.Mounting Size: GY-5001 LCD Display Ultra-thin Generator Hour Meter