Three Phase Meter 1.Meets IEC-10101 (EN61010) ,CAT III ... Hz~70Hz 3.ISO,CE,Patent,OEM ETCR1000A Three Phase Meter Our buyers have stayed with us for 11years12 ... Product Features:ISO, Patent & CE certificateOEM services availableFunction: phase detection (positive/negative)Display: LED Dimension (mm): 70* ...