The Specialized Air Tool Switch Comp Pump is race-ready with all sorts of convenient features in a compact design that stays out of the way when you don't have to worry about a pump. Unlike most mini pumps, the Air Tool Switch Comp has a rotational gauge for easy viewing and precise filling. The plunger locks with a simple twist so it doesn't start pumping mid-pedal, and Specialized included a water bottle mount for secure storage on your bike.