Air Rush is a compact, innovative electric pump that makes flat fixes and top-ups easier than ever. Just attach the pump, press a button, and watch the pressure gauge as you fill your tires pre-ride or mid-ride. The color LED screen lets you view current pressure and set your target pressure, so you can get your setup dialed to perfection. No fussing with mini-pumps or wasting CO2 cartridges. Trek Air Rush Electric Features Battery charges in less than an hour via a USB-C port Presta, Shrader, and needle valve adapters are included Displays pressure in PSI, bar, and kPa Inflation pressure range: 2 – 120 PSI Net weight: 3.8oz. (108g) Size: 3.15 x 1.77 x 1.26in (80 x 45 x 32mm) Replaces up to four 16g CO2 cartridges with one single charge