CyberPower’s CP900AVR has an easy-to-use interface with just two buttons (electricity on/off and mute) and 4 indicator lights (showing when the unit is turned on, in the event the battery backup kicks in, when AVR is activated, and when there’s a power overload) around the entrance of your device. Picture: https://fernandoutqnh.blogpostie.com/57595923/detailed-notes-on-battery-ups-price