Jayron Hm055Ad(Ac/Dc 5V To 277V) Digital Lcd Hour Meter Accumulate Data For, 1 NInE-ROnG has focused on product development and manufacturing in the fields of hour meter, battery indicator, multi-function meter,service for the garden machinery industry, outdoor power vehicle equipment, transportation vehicles.In addition, we are also committed to creating simple and practical day timers, night light, hygrometers and other products to add fun and security to our life. HOUR METER----Tracking the number of hours of the machine; the total running time of the machine will be displayed and remain visible. The Max timing value is 999,99 hours; 0.1 hour accuracy; TOT cannot be reset. SCOPE OF APPLICATION----Suitable for AC/DC power supply equipment: 6V 12V 24V 36V 48V 72V 110V 120V 230V. Wide voltage range: AC / DC 5-277 volts; AC / DC voltage compatible.Suitable for most types of zero-turn lawn mowers; also suitable for other AC/DC power supply equipment. DATA STORAGE----When the external power supply is turned off, the data will be automatically stored, and the reading will be accumulated in the next cycle directly. INSTALLATION----Two termainals regardless of positive and negative.Built-in CR2050 battery.Easy operation,if product is installed correctly,the hourglass flashes. OTHER----Sealed with epoxy resin, it has excellent heat resistance and vibration resistance; Waterproof grade: IP68; 2-year warranty.