The pump houses an internal, rechargeable battery that can be easily trickle-charged using the included wall charger or car cigarette lighter adapter. If the battery is drained but you still want to pump something, the pump can be run from other 12V power sources such as a car battery using the included power cable. The heavy-duty hose comes with several different sizes and types of adapters for compatibility with H3 Halkey-Roberts SUP valves, 9mm kite inflate valves, and Boston screw valves (commonly found on kites and many air mattresses). The pump hose comes with a kite leash to hold your kite while it is being inflated. Easily carry the pump and all accessories in the bag with the shoulder strap or just take the pump using the pump’s convenient handle. Features: Portable, high-efficiency, and low-noise electric pump in an all-in-one convenient package Pumps up to 22 PSI (1.5 Bar) with wide pressure range selectable by easy analog dial indicator (about 2-4 inflatable SUP to 12 PSI or 15-20 kites to 6 PSI before recharging) “Set it and Forget it” automatic shut-off at the selected pressure Twin cylinder, single-stage pump fills quickly and to higher pressure than most electric pumps Internal, rechargeable 12 volt battery Easily recharge the battery with