U-Socket 15 Amp AC Wall Outlet Receptacle with 4 Built-In USB Charging Ports, White UL Approved - 4 USB PORTS Modernize your electrical outlets with U-Socket, the 1st change to the wall outlet in 85-years. The wall outlet has consisted of hot, neutral and ground plugs that provide 110-Volt of AC power. This U-Socket adds 4 USB plugs that also provide 5-Volt of DC power and supplies a total of 4.2 Amp to USB ports. This helps maximum charging current to current intelligent phones and other PDAs. Now your mobile device charger is conveniently built right into the wall. Save space and get a clean, uncluttered look. Also reduce your energy costs because unlike external chargers, U-Socket only comes on when you need it and shuts off when you don't. To top it off, it is UL approved. Color: White.