Multifunction LED electric power meter Multifunction meter with RS-485 & MODBUS protocol Different sizes power meter available Multifunction LED electric power meter Multi-function ... 0-5/10VTime Clock Error<0.5s/dOperation Environment-10-55°C, humidity≤93%, no erosion place ... , altitude≤2500mStorage Environment-20-75°C, humidity≤93%SafetyInsulationSignal, power, output ...