The TLP310USBC Protect It!® 3-Outlet Surge Protector features three NEMA 5-15R outlets and a surge suppression rating of 510 joules to protect your components against surges, spikes and EMI/RFI line noise that can damage sensitive electronics and destroy data. Plus, two USB ports produce 3.1A of combined power to charge your mobile devices, such as smartphones, tablets and MP3 players. Recommended for home, office, workstations, dorms and hotel rooms, the TLP310USBC mounts permanently to a clamp that attaches to most desks, tables and flat surfaces. The 10-foot power cord fits through the back of the clamp to reduce cable clutter. A top storage shelf holds smartphones and other small devices while they're charging. Tripp Lite will repair or replace any connected equipment damaged by surges, including direct lightning strikes, up to $20,000 for life (valid in the U.S., Canada and Puerto Rico only).