Ntonpower via Amazon offers the Ntonpower 4-USB Port 4-Outlet Smart Power Strip Surge Protector in Black for $17.99. Coupon code "KIJ6O8X4" drops it to $14.03. Plus, Prime members receive free shipping. That's $16 off list and the lowest price we could find, although we saw it in another color for a buck less six days ago. It features a five-foot cable, 1,700 joules of surge protection, and four smart 2.4-amp USB ports.