APC Back-UPS Pro, 900VA/540W, Tower, 230V, 6x IEC C13 outlets, AVR, LCD, User Replaceable Battery This product is part of the Back-UPS Pro range. This 900VA UPS has 6 total that provide UPS power backup and surge protection. It features a built-in AVR and a LCD interface with audible alarms.The Back-UPS Pro family offers guaranteed power protection for high-performance computer systems, routers, external storage devices, game consoles, and other home and business electronics. Main Input Voltage 230 V Main Output Voltage 230 V Rated power in W 540 W Rated power in VA 900 VA Input Connection Type IEC 60320 C13 Output connection type 6 IEC 60320 C13 Battery type Lead-acid battery Network frequency 50/60 Hz +/- 3 Hz auto-sensing Input voltage limits 176...294 V Maximum input current 10 A Switching current capacity 10 A Maximum configurable power in W 540 W Output frequency 50/60 Hz +/- 1 Hz sync to mains UPS type Line interactive Wave type Stepped approximation to a sinewave Maximum configurable power in VA 900 VA Transfer time 10 ms typical : 12 ms maximum Product certifications- A-Tick, C-Tick, CE, EAC, RCM, TISI Marking- GS Mark Standards- EN/IEC 62040-1:2019/A11:2021, EN/IEC 62040-2:2006/AC:2006, EN/IEC 62040-2:2018 Ambient air temperature for operation 0…40 °C Relative humidity 0…95 % Operating altitude 0...10000 ft Ambient air temperature for storage -15…45 °C Storage Relative Humidity 0…95 % Storage altitude 0.00…15240.00 m Acoustic level 45 dBA Heat dissipation 16.4 Btu/h Mounting mode- Not rack mountable Replacement Battery -APCRBC164