UPS Online Ultra Power RT-3KS 3000VA/3000W, 2U RM/Tower, LCD display, RS-232, USB, SNMP Slot, 2*Schuko sockets, metal case3KVA / 2700WForm factor: Rack MountExternal Battery PackDisplay: LCDInterface: RS-232, USB, SNMP SlotThe SNMP card only can take the external one and connect to the RS232Battery: 6pcs 12V9AHInput voltage range: 220V: 115~300VacFrequency: 220V: 40~60Hz, Adjustable by software : : : : : Output voltage range: 220V: 220±2%VacWave form: : Sine WaveTransfer time: 0 msOverload capability: 110%~150% lasts for 30 seconds then transfer to bypass output, over 150% lasts for 300 milliseconds.Protections:1. Auto re-starts when AC recovers2. Silence setup3. Automatic charging (offline charging)4. Battery low voltage protection5. Overload & Short circuit protectionGross weight: 28,35 kgNet weight: 27 kg