This power strip features 16 AC outlets (1875W/15A) and 4 smart USB charging ports (5v/3.1A) so you can power up to 20 devices at the same time. The USB ports can detect and deliver an ideal input current of up to 5V/2.4A (the actual current depends on the devices' demand). The price drops from $27.99 to $16.79 when you apply the coupon code "AOFHPC2X" at checkout. Shipping is free for prime members or nonmembers get free shipping over $25.