Features: Delay Display Function,Power off Memory Function,Open Circuit Reset Function,etc. Timing System Including accumulating total running hours TOT, total hours reset etc. It can work on12/24V,36V,48/72V lead acid storage battery.It has a powerful battery indicator system and timing system. After connecting the meter?��s with battery, meter will identify the voltage automatically. To maintain the battery, this battery indicator function designed with recognition false battery charging signal. Specification: Material:ABS Max Display Hours:999999 Hours Resolution Hours:0 . 1 Hours Resettable: Total hours resettable Package Weight:8*8*8CM Package size: 60g Package Included: 1 X Hour Meter