The black Pulse 1500 Rechargeable Power Pack from Brunton is a compact, 1500mAh rechargeable power station. It features a Micro USB and standard USB output ports to connect most small electronic devices using their USB charging cables. With an output of 1.0 amp, this power station is ideal for charging smart phones, MP3 players, cameras, or other small electronic devices. The permanent internal battery is charged using a standard USB cable plugged into any USB port, a USB/AC plug or Brunton's Solaris 4 USB solar charger. The compact and lightweight Pulse 1500 is only 2.7 inches square with a ½" profile, and weighs 2.7 ounces. There is a recessed On/Off button with power level indicators next to it.