Mounts directly over any existing wall outlet to give you six additional AC outlets. Two powered USB ports provide convenient one-source charging for mobile devices, including smartphones and tablets. Features oversized metal oxide varisotors (MOVs) to absorb excess electricity. Damage-resistant housing protects circuits from fire, impact, and rust while also preventing dents and scratches. "Protected" indicator light turns green to let you know your equipment is secure. Number of Outlets: 6 AC; 2 USB; Joules Of Surge Protection: 900 J; Protection Type: Laptop; Computer; Connected Equipment Guarantee/Warranty: $25,000 Limited.