CyberPower’s CP900AVR has an uncomplicated-to-use interface with just two buttons (power on/off and mute) and four indicator lights (displaying if the device is turned on, if the battery backup kicks in, when AVR is activated, and when there’s a power overload) within the front in the unit. Picture: Michael Hession https://conkeysbakery26936.bligblogging.com/37006422/the-smart-trick-of-battery-ups-9ah-12v-katzuni-kz12v9-that-no-one-is-discussing