The Mega Pump makes inflating and deflating even large air pads easy. This model isnt packed with extra featuresthe Mega Pump focuses solely on doing its job as a pump. *Why use a pump? Many modern pads have a fairly large volume, making them laborious to inflate by mouth. But the main reason for using a pump is that it prevents moisture from entering the padexhaled air is very humid. An accumulation of humidity in the pad can result in mould issues, and even damage the seams inside the baffles. - Charges via USB-C port - Included adapters fit all Exped mats and many others - 3D-printing enthusiasts can download files for additional adapters from Thingiverse - Works for both inflation and deflation - *What's in the box:* - Mega Pump - USB charging cable - EXPED inflate adapter - EXPED deflate adapter - EXPED Universal Valve Adapter (clear, 3 pcs) - Storage bag