Monoprice 11149 3 Outlet Power Surge Protector Wall Tap With 2 USB Ports 3.4A - 540 Joules (1) Save when you buy the 2-Pack! Rated for 120V, 15A, and 1800 watts Provides up to 540 Joules of power protection Two USB charging ports produce a total of 3.4A of charging power Can handle up to 36,000A current spikes and has a 500V clamping voltage; Provides up to 40DB of EMI/RFI rejection