Twist-To-Inflate technology for fast, easy & controllable CO2 inflation!A CO2 inflator built just for the Mountain Bike rider with a mini back-up hand pump built right in for inflation security!CO2 cartridge stores in handle when not in use & doubles as handle extension for manual inflation. Built in hidden stash container.NEW magnet lock feature! Keeps the barrel locked & closed securely. Valve interface: Slip on for Presta valve. For Schrader, attach included Schrader valve adaptor.