1. Voltage: Measuring range:AC70 - 260V, Initial test voltage:70V, Accuracy: 1% 2. Current: Measuring range:0 - 100A, Start test current:0.05A, Accuracy: 1% 3. Active power: Measuring range:0-22KW, Start test power:1.0W, Accuracy: 1% 4. Power factor: Measuring range:0-1PF 5. Frequency: Measuring range:45-65Hz, Accuracy: 1% Energy: Measuring range:0 - 999999kWh By test the Range will keep the data, otherwise you will reset it. Accuracy: 1% WIFI/BLE module parameters: 1. Module number:-BK7231N 2. Communication standard:802.11b/g 3. Communication frequency:2.4GHz 4. Bluetooth communication:LE connection/6dB transmission power Attention 1. This product is suitable for indoor use. 2. This product is suitable for AC power. 3. Voltage and amps must not exceed the calibration range. 4. Make sure the wiring is correct. Colour:White-Green Material:Plastic Package Contents: 1 * Energy Power 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.