A professional manufacturer of E1/BER tester, ADSL tester, light source, optical power meter, optical talking set, optical fiber identifer, fiber fusion splicer, cable fault locator, PCM analyzer; Battery Discharge Tester, Battery Intelligent Loader, Battery Charger, Battery Activator, Inner Impedance Tester, Power Quality Analyzer, Earth Tester, Insulation Tester and so on.