CyberPower’s CP900AVR has a straightforward-to-use interface with just two buttons (ability on/off and mute) and 4 indicator lights (displaying in the event the device is turned on, if the battery backup kicks in, when AVR is activated, and when there’s a power overload) about the entrance of the device. Picture: https://fernandoiifbx.blogdemls.com/36231788/getting-my-battery-ups-backup-to-work