This design smart IOT device applied to AC 230V, 50/60Hz, rated current up to 63A single circuits in resident, commercial and industrial buildings with 2.4G WiFi, to measure electricity consumption and offer prepayment as option; to remote control and set protections against over/under voltage, overcurrent, residual current(leakage), high temperature via mobile App anytime anywhere;and auto reclosing after protected conditions recovery to achieve non-attended management; programmable timing control to make your scheduled life efficiently and save electricity, and sharing device with your family or persons concerned in . It also supports local manual control without WiFi, and voice control through AI speaker, such as , Assistant, Yandex , and etc. Functional features:01. Four on control:Remote control anytime anywhere (mobile app, Tuya Smart, Smart Life);Voice control (AI speaker, Alexa, , , ...);Timing control (programmable Schedule);Manual control (by keys and handle).02. Monitor real-time electricity consumption and statistics on phone (A, V, mA, kW, kW/h, ); 03. Prepaid metering mode available as option by switch; 04. Adjustable protections against over/under voltage, overcurrent, residual current(leakage), high temperature; 05. Overcurrent protection: 1~63A adjustable, 63A as default; 06. Over voltage protection: 120~300V adjustable, 275V as default; 07. Under voltage protection: 80~210V adjustable, 175V as default; 08. Residual current(leakage) protection: 10~99mA adjustable, 50mA as default; 09. Alarm temperature protection: 10~85 adjustable, 60 as default; 10. Recovery on-delay time: 5~90s adjustable, 30s as default Main Rated Supply Vottage:AC 230V Operation Voltage Range:AC 80V-400V (singlephase)Rated Frequency:50/60 Hz Electric Current:1-63 A OverVoltage:120-300 V UnderVoltage:80-210 V Electric Leakage:10-99mA Mounting: 35mm din-rail; Power display range:0-99999.9kWh; color:White Material: plastic Package Contents: 1 x Electric Energy Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.