CyberPower’s CP900AVR has an easy-to-use interface with just two buttons (ability on/off and mute) and four indicator lights (demonstrating in the event the device is turned on, when the battery backup kicks in, when AVR is activated, and when there’s a power overload) within the front on the unit. Image: https://zioncffgg.bloggerbags.com/41713163/what-does-battery-ups-12v-7ah-mean