Whether you're on a plane or trekking through the woods, the BoostBloc 4000 provides fast and efficient power to your smartphone or mobile device through a 200% dump charge. The sleek and elegant design fits in the palm of your hand and weighs a mere 3.7 oz. so you can rest assured it's not taking up valuable space in your carry-on or pack. It's equipped with a micro-USB DC input for use with most smartphone chargers and a standard USB port for charging other mobile devices. An LED charge indicator lets you monitor the battery-charge level at a glance. Give the unit a little shake to "wake it up" and check its battery level. Integrated 4000mAh lithium-ion battery charges via the included USB cord when connected to your computer. Includes unit and user manual. Color: Black. Dimensions: 1"H x 2.2"W x 2.2"D. Weight: 3.7 oz.