UPS Online Ultra Power 1000VA/900W, RM, RS-232, USB, SNMP Slot, metal case, LCD displayRT-1KS 1KVA / 900WForm factor: Rack MountExternal Battery PackDisplay: LCDInterface: RJ45 /11+RS232, SNMP slotInput voltage range: 220V: 115~300VacInput frequency: 220V:46~60Hz, Adjustable by softwareOutput voltage range: 220V: 220±2%VacOutput frequency (AC mode): 220V: 46~54HzOutput frequency (DC mode): 220V: 50±0.2%Hz Wave form: Sine WaveBackup time(minute, full load/half load): >5' / 14'QTY & capacity of batter: 2pcs*12V9Ah Transfer time: 0 msOverload capability: 110%~150% lasts for 30 seconds then transfer to bypass output, over 150% lasts for 300 milliseconds.Protection:1. Auto re-starts when AC recovers2. Silence setup3. Automatic charging (offline charging)4. Battery low voltage protection5. Overload & Short circuit protectionUnit dimension (mm): 441*445*88 Net weight: 12 kg