OFF-LINE UPS (Long Backup Time)

Specifications: 
1) AC input: 220V AC &lusmn;20%, 50Hz ±5%
2) UPS output: 220V AC 50Hz
3) Automatic voltage rectification
4) Multi-functional protection: short circuit, low battery protection, 
    and warning
5) Long backup with nonstop power supply system
6) Built-in CPU & Software
7) Outage Switching Time: ≤4ms (Synchronization with AC)
8) Alarm: Buzzer, LED

Inner packing: 
2,000VA - 3,000VA:
Size: 470 x 190 x 340mm