CyberPower’s CP900AVR has an uncomplicated-to-use interface with just two buttons (power on/off and mute) and four indicator lights (showing if the device is turned on, once the battery backup kicks in, when AVR is activated, and when there’s a power overload) within the front of the device. Image: Michael Hession https://landenrtsrp.blogsidea.com/42796101/detailed-notes-on-ups-battery-price-in-sri-lanka