CPXTM system means you can operate on included battery cartridge * Inflates most products with included adapter for Boston valves, pinch valves or Coleman® Double LockTM valves * Can be powered by 4 D batteries (not included) * Upgradeable to CPXTM 6 rechargeable energy pack (sold separately) * Coleman is proud to donate 5% of the purchase of this product to Camp Mak-A-Dream.