Beautiful appliance,Steel shell, Colored carton box.with accessories one fuse. User's manual for every set.natural external packing.
Protect Function:
Over-voltage protect.
Over-current protect.
Short-circuit protect.
Delay function.
Input and output voltage and current product for two fuse on PCB.
Four LED Indication,Normal Working(Green Color LED),Over Voltage(Red Color LED),Under voltage(Yellow Color LED),Delay(White Color LED) 

Main Technic Date
Phase no:Single-phase
Input voltage:AC 160-270V stabilizer must be working
Output voltage:220v±8% for PCB have 4pcs Relay control.
Output voltage beyond 248V,automatic cut off current.
If input voltage 160V rapidly rise 275V,0.2 cut off currency,
If input voltage 275V rapidly lowtes 155V,stabilizer output no 220V
Delay time:About 2-3 minutes
Insulation resistace:2MΩ
Electrc strain:1500V/min
Over-vltage protection:248±4V(Output)