CyberPower BU800E provides home and office users with a reliable battery backup and safeguards office PCs and other electronic devices from surges, spikes, brownouts and other power irregularities. The product adopts line-interactive topology with Automatic Voltage Regulation (AVR) function to offer stabilized AC power output. The patented GreenPower UPS™ Bypass design achieves ultra-low power consumption to reduce energy costs, and allows a lower operation temperature which extends battery lifespan. Configurable alarm allows users to switch the audible alarm on or off during battery mode to avoid unnecessary disturbances. Its brick design with mounting slots allows users to place it easily on walls, desks or other tight spaces.