CyberPower’s CP900AVR has a simple-to-use interface with just two buttons (electricity on/off and mute) and four indicator lights (showing when the device is turned on, when the battery backup kicks in, when AVR is activated, and when there’s an influence overload) around the entrance with the device. Photograph: Michael Hession https://cesar6990g.ampedpages.com/details-fiction-and-battery-ups-syndome-63205088