The PowerShield DC Mini is designed to provide emergency power backup to all kinds of DC powered equipment including routers, modems (including fibre optic ONT), VOIP phone systems, surveillance equipment, alarm systems and many critical telecommunications devices. The DC Mini can economically provide hours of operation during power failure. Built in replaceable Li-ion batter Auto start when plugged in Embedded micro-controller Multi-colour indicator Manual power off switch port Overload, short-circuit, over-charge and over-charge protection 2 Year Warranty