CyberPower’s CP900AVR has a simple-to-use interface with just two buttons (electrical power on/off and mute) and 4 indicator lights (showing in the event the unit is turned on, if the battery backup kicks in, when AVR is activated, and when there’s an influence overload) on the front of your unit. https://condo-near-me48035.answerblogs.com/36583102/the-best-side-of-smart-ups-1500-battery