1. Compact 1U or 2U design (1U for 500 ~800VA, 2U for 600~1000VA) 2. Provides line-interactive design and true sine wave output 3. Microprocessor control guarantees high reliability 4. Built-in Boost and Buck AVR to stabilize input voltage 5. User-Replaceable hot swappable battery design & cold startup capability 6. Enable to extend runtime with scalable external battery pack (inbuilt 10A battery charger) 7. Fully protection for overload, short-circuit, overheat and battery over discharge protection 8. RS232 /USB communication port 9. SNMP Card SLOT available