Tuya WIFI Zigbee Smart Circuit Breaker With Metering 1P 63A DIN Rail for Smart Home Wireless Remote Control Switch by Smart Life Description: WiFi Wiring: Power must enter from the top and must be Live line Neutral Line (L N). Live line Live line (L L) cannot be used. Only the black button version has metering function, while the blue button version does not have metering function Featured functions with metering version (black button version): power metering, 1-63A adjustable, alarm&protection settings: temperature (40-150 ), overcurrent (1-63A), overvoltage (220-265V), undervoltage (76-240V), usage logs (switch logs, alarm logs, setting logs) Features without metering version (blue button version): Alarm&Protection: Temperature (factory default of 80 , cannot be set), usage log (switch log, setting log) Basic functions: APP remote control, voice control, status feedback, timing, countdown, power outage memory, home sharing, group function Zigbee Zigbee version requires a tuya zigbee hub/Gateway for remote control Wiring: Power must enter from the top and must be Live line Neutral Line (L N). Live line Live line (L L) cannot be used. Characteristic function: Electricity metering, adjustable from 1 to 63A, alarm and protection settings: temperature (40 to 150 ), overcurrent (1 to 63A), overvoltage (220 to 265V), undervoltage (76 to 240V), power (1 to 26KW), usage logs (switch logs, alarm logs, setting logs) Basic functions: APP remote control, voice control, status feedback, timing, countdown, power outage memory, home sharing, group function Specifications: WiFi