Monster’s wall mount surge protectors feature MOV - Metal Oxide Varistor - technology that prevents electrical fires that can damage appliances and property. This safe wall tap surge protector can protect for up to 6 AC and 4 USB ports with up to 980 joule energy rating. As opposed to other surge protectors, this can be mounted up on a wall and hidden behind furniture so as not to affect a room’s aesthetic. This wall-mounted surge protector has a built-in blue LED light that indicates when your devices are protected and when your wiring is properly grounded. Featuring smart USB charging, this surge protector protects not only your equipment but powers and protects mobile devices such as smartphones and tablets. Safeguards your electronics and equipment from permanent damage due to power surges caused by storms or outages; our wall tap surge protector with USB can also prolong the life of your gadgets.