The Belkin BU3DC001-12V Residential Gateway Battery Backup REV B is a gray tower-shaped battery backup designed for Belkin and AT&T U-verse Vpice service compatibility. With a maximum power of 36W and voltage compatibility of 12V, this battery backup provides surge protection, noise filtering, and AVR (automatic voltage regulation). It features an LED display, audible alarm, and one outlet for reliable power protection and distribution in a residential setting. Perfect for ensuring uninterrupted power supply during outages or emergencies.