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 able to do calibration by adjusting the percentage Automation, It allows to make a Scene for this device working with other tuya devices: Set Automation for the Measured Device, For example, If Power or Current Is over the Value, then other tuya device starts to work. Non-connect to Be Safe, Easy and Safe to Install: No need to change the wires, Just put the wire into the clamp, then it can measure, very easy. Small Size Module , Easy to Install. We guarantee good quality, every product will be tested before delivery. Please Note this Item Requires a Tuya ZigBee Gateway to Work. 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:-10℃ - 55℃ Type:1 Channel-1CT Colour:White Material:Plastic Package Contents: 1 * Tuya Smart ZigBee 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.