This design smart WiFi+RS485 IoT device applied to AC230V/400V, 50/60Hz, rated current up to 63A single or three phase 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 overload, residual current(leakage), high temperature, overcurrent, over/under voltage, low balance(prepaid) via mobile App anytime anywhere; programmable timing control to make your scheduled life efficiently and save electricity, and voice control through AI speaker, such as for , for Yandex , and etc. Device sharing with your family or persons concerned in . Poles: MCB(1P+N, 2P, 3P+N, 4P); RCBO(2P, 4P); Rated voltage: AC230V/400V (over/under voltage protection adjustable); Rated current: up to 63A (overcurrent adjustable); Frequency: 50/60Hz; Breaking capacity: 6000A Mounting: 35mm din-rail; Communication: WiFi 2.4G + RS485 Modbus RTU; Functional features 01. Four options on control: Remote control anytime anywhere (mobile app, Tuya Smart, Smart Life) Voice control (AI speaker, for , for , , ...) Timing control (programmable Schedule) Color: White Material: ABS Package Contents: 1 * Voltage Current Protector 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.