This all-in-one design smart WiFi+RS485 IoT device applied to AC400V, 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 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 Google Assistant, for Yandex , and etc. Device sharing with your family or persons concerned in . Poles:MCB(1P+N, 2P, 3P+N) Rated voltage:AC400V (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 Colour:White Material:PC Package Contents: 1 * MCB Breaker 1 * English instruction manual 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.