... ten years requency:4HZ ITEM: KLS11-KQ16B counter, Meter counter, mechanical counter, Step counterVery Stable quality/ Good ... big plastic cases. (OEM & ODM)4- Develop various power meters. (ODM)5- Develop GPRS modems according to ... hardware, LED displays, LCD displays, power meter parts (including counters, shunters, transformers, varistors, capacitors, meter case tooling), circuit connectors, cable, ...