Serious capacity for the power user! Never run out of device power again. Run your tablet, music player, smartphone or any other USB-charged device for hours longer than its built-in battery alone. Its sleek cylindrical design matches the u-mount series perfectly and the low profile design Is easy to bring along to gigs, the gym, school, in the car, or anywhere else! Plus, it includes a u-mount base for the ultimate in external power convenience.