Function 1. :Measurement range: 80 ~ 260V.Resolution: 0.1V.Measurement accuracy: 0.5% 2. current.Measuring range: 0 ~ 10A (PZEM-004T-10A); 0 ~ 100A (PZEM-004T-100A).Initial measurement current: 0.01A (PZEM-004T-10A); 0.02A (PZEM-004T-100A).Resolution: 0.001A.Measurement accuracy: 0.5% 3. Active power:Measuring range: 0 ~ 2.3kW (PZEM-004T-10A); 0 ~ 23kW (PZEM-004T-100A).Initial measurement power:0.4W.Resolution: 0.1W.Display :Less than1000W, display one decimal place, for example: 999.9W. equal1000W, only display whole numbers, for example: 1000W Measurement accuracy: 0.5% 4. Power factor: Measurement range: 0.00 ~ 1.00 Resolution: 0.01 Measurement accuracy: 1% 5, frequency Measuring range: 45Hz ~ 65Hz Resolution: 0.1Hz Measurement accuracy: 0.5% 6, active energy Measuring range: 0 ~ 9999.99kWh Resolution: 1Wh Measurement accuracy: 0.5% Display : Less than10kWh, display unit is Wh (1kWh = 1000Wh), for example: 9999Wh equal10kWh, display unit is kWh, for example: 9999.99kWh Reset energy: Use software reset. Power failure alarm:You can set the active power . When the measured active power exceeds the ,Can report to police Communication Interface:RS485 interface colour:green + black Material:plastic Package Contents: 1 x Digital Multi-function Meter 1 x Coil Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.