The Belkin Residential Gateway (RG) Battery Backup (Model BU3DC001-12V, Revision B) is a reliable and efficient power protection device designed for residential use. With a maximum power output of 36W and a 20+4 pin connector, it is compatible with Belkin and AT&T U-verse Vpice service models. The gray tower unit includes an audible alarm feature for added convenience. Ideal for ensuring uninterrupted power supply to your home networking and computer systems, this battery backup is a dependable choice for maintaining your devices' functionality during power outages or emergencies, this item comes AS IS no cords or wires, this item is UNTESTED, thank you for looking no returns please.