CyberPower’s CP900AVR has a straightforward-to-use interface with just two buttons (ability on/off and mute) and four indicator lights (displaying if the unit is turned on, in the event the battery backup kicks in, when AVR is activated, and when there’s a power overload) to the entrance on the device. Picture: https://fernandob4fc2.ssnblog.com/35307983/fascination-about-battery-ups