Features: Delay Display Function, Power off Memory Function, Open Circuit Reset Function, etc. Timing System Including accumulating total running hours, total hours reset, etc. It is compatible with 12/24V, 36V, and 48/72V lead acid storage batteries. It includes a powerful battery indicator system and timing system. Upon connecting the meters with the battery, the meter will automatically identify the voltage. To support battery maintenance, this indicator function includes the capability to recognize false battery charging signals. 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