SHAOXING HUAZHEN's Battery/Hour Meter is a combination of solid state battery indicator and hour meter, housed in a single 52mm diameter case and void of moving parts. The two-in-one unit provides exceptional reliability even in severe operating conditions. This type is suited for OEM's panel makers and contract manufacturers to measure equipment usage for preventive maintenance, scheduling, warranty validation and renting/leasing. Compact size ideal for assemblies; no moving parts or motor driven digits to wear out; non-volatile memory can be powered down and not lose hours counted; and counting starts with enable connection and counts display when power is applied to the meter.