CyberPower’s CP900AVR has an easy-to-use interface with just two buttons (electricity on/off and mute) and four indicator lights (displaying if the device is turned on, when the battery backup kicks in, when AVR is activated, and when there’s a power overload) to the entrance on the unit. Picture: Michael Hession https://wordpresswebsiteservices60482.imblogs.net/85933102/details-fiction-and-battery-ups-syndome