Accuracy:  voltage/current: 0.2class; power, power factor, frequency: 0.5class;
Maximum display: 9999;
Distinguishability: voltage: 0.1V, current: 0.001A;
Input: AC 500V*5A;  
Analog output (optional): voltage: 0-5V,1-5V; current: 0-20mA,4-20mA;  
Load capacity: voltage≥2KΩ;  current＜300Ω ;
Communication  interface: RS485(Baud rate: 9600bps, data format: start bit 1 bit, data bit 8 bits, stop bit 1 bit, Check digit can be set) ;
Switching value output:  Relay output, contact capacity AC 250V/5A;  
Power supply: AC/DC 85~265V
Power consumption: ≤3.5VA;
Isolation voltage: power/input /output≥DC2.5KV/min.1mA
Surge impact immunity: 2500V;
Anti-lightning surge: 2000 V;
Isolation resistance: ≥100MΩ;
Operating temperature: -10℃~+60℃;
Storage temperature: -40℃~+70℃.