Leviton 3500-P 540 Joules, 400V Impulse Clamping, Plastic Housing, 120 Volt 15 Amp Surge Protected, 6-Outlet Surge Adapter, Beige They are ideal for immediate surge protection in tight spaces such as behind desks, book cases, sofas and media equipment Monitor lights ON indicates circuit is powered and protection 3-stage protection: hot-to-neutral, hot-to-ground, neutral-to-ground Built-in fuse protection