... Electric life: 100 thousand times it does not depends on the hours. Models: Model and TypeOutputPresetDisplayDisplaySizeHH4-4RNRelay output1 ... Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State ... in more than 20 domestic and international customers on OEM basis, and provide customer PRIVATE brand services ...