... light weight, specious nice appearance, convenient installation, etc. DCM228C-R-01 Round Meter,electronic typeGENERALDCM228C-R single phase electronic socket installed ... power supply state (green) and signal of energy impulse (red);♦ Standard configuration dont detection direction of the flow of load ... standard IEC 62053-21.♦ Directly connect operation. DCM228C-R-01 Round Meter,electronic type