CyberPower’s CP900AVR has a straightforward-to-use interface with just two buttons (power on/off and mute) and four indicator lights (displaying when the unit is turned on, if the battery backup kicks in, when AVR is activated, and when there’s an influence overload) around the front in the unit. Picture: Michael Hession https://preecha-concrete-pile93603.link4blogs.com/57367353/the-greatest-guide-to-ups-battery-price-in-sri-lanka