Item Type:Current Meter Specification: AC 5A Overload: Current: Continuously 1.2Times/s, Instantaneously 10 Times/s. Accuracy Level: 0.5 Display: LED Display, Range From -1999 To 1999 Power Supply Voltage: AC220V Power Consumption: <5VA Insulation Resistance: ≥100MΩ Isolation Voltage: 2kV/1min (Rms) Between Power/Input/Output Mean Time Between Failures: ≥50000h Temperature: Work -10 ~ 55 ° C, Storage -25 ~ +70 ° C Humidity: ≤93%Rh, No Dew, No Corrosive Gas Altitude: ≤2000m Programming Instructions: There are three buttons on the meter, such as ''Settings'', ''←'', ''→'', ''┙''. ''←'': Left shift key for function selection. ''→'': Confirm key for changing the digital position for digital input. ''set'': The main menu button for moving the menu backwards or ignoring the operation. ''┙'': Enter the confirmation button to enter the next menu or confirm the operation. 1、The metering of the energy meter can measure the current parameters and setting ratio of the grid through the keys on the panel. 2、0.5 of accuracy level is high enough to complete some high accuracy works. 3、Low energy consumption,the meter can saves a lot power during use. 4、The insulation resistance reaches 100Mohm,safe to use. 5、The mean time between failure is more than 50000h,very reliable. 1 x Meter 1 x Users Manual