Firstgear Laguna GPS Tank Bag With Backpack Expandable, GPS Tank Bag with backpack capability Positions your GPS on any bike right in front of you and collapses to hide it when not in use 6in.W x 4 1/2in.H pocket will accommodate larger GPS units Second transparent pocket on top of the bag for MP3 and cell phones Grommets in each device pocket and loops inside bag route cables out of the way