Feature * DDSU1877 is used to measure the rated frequency of 50Hz, Rated voltage below 265V, single phase AC smart power. * Made of fine quality ABS material, impact resistance, heat-resistant, cold-resistant, and with fine insulating effect. * Alarm when low energy/overload/fraud. * With RS485, GPRS, 4G, or other communication functions for reading meter and setting parameters. * The smart meter adopts the special large scale integrated circuit and special technology to ensure the accuracy and reliability of measurement. * 5+1 bit wide temperature LCD display, real-time display voltage, current, power, total energy kWh. * Comfortable guide rail installation mode 35-36 mm. * Calculate total consumption, real-time view of power consumption via mobile phone. * APP remote control. You can easily control your devices when you leave your home or fast-forward your home, easily control the status of your home device at any time via the mobile APP. * Long service time by high brightness LED indicator. * It can realize the functions of automatic tripping when the balance is exhausted. * After you pay for the electricity, the energy meter could display the remaining electricity. * It could realize remote manual closing and open the energy meter. * The Single phase WiFi energy meter will update the Kwh data when disconnect with wifi. It will not lose the historical data if there is a power outage.