Fangrui Product Details App Can Display Channel A And B Real-time Power, Current, Voltage For Forward And Reverse Direction Clrealy. The Meter Is Allow To Do Calibration, The Device Is To Do Calibration By Adjusting The Percentage. 2 Channels For Reverse And Forward Direction And You Can Read From App For Each Channel Real-time Total Power Of 2 Channels Of Reverse And Forward Direction. Power For Channel A And B Separately(w) Current(ma) Voltage(v) Power Factor, And Frequency(hz) Electricity Statistic For Each Channel In Forward And Reverse Direction. Hourly Elec. (kwh) Daily Elec. (kwh) Monthly Elec. (kwh) Yearly Elec. (kwh) Technical Data: Rated Voltage: 100-240v Ac 50/60hz Measurable Current Range: 0.2a-80a Protocal: Zigbee Wifi Frequency: 2.4ghz (not Support 5ghz) Ambient Temperature Range: -10c ~ 55c Electricity Statistic Channel A , B Separately And Total Daily Monthly, Yearly Reverse And Forward Direction Automation , It Allows To Make A Scene For This Device Working With Other Tuya Devices Set Automation For The Me