Mini and Light: This portable mini bike pump is only the size of a palm and is almost weightless (only 160 g). It is extremely compact and can be attached to the bicycle frame under the water bottle cage with the holder. Unique design: the air nozzle has a dust cover that effectively prevents dust from entering. On the air nozzle there is a barometer that can accurately display the tyre pressure and avoid pinching the tyre with your hands. Presta & Schrader Compatible: The valve head can be easily switched between Presta and Schrader valves, making it easy to use in both types of bicycle tyres. Maximum pressure of 120 PSI: With a maximum pressure of 120 PSI, you can inflate your tyres with less force, easier and more efficient, and shorten the inflation time compared to conventional mini bicycle pumps. Widely used: The mini bicycle pump can be used to inflate bicycle tyres during emergency repairs or simply to maintain tyre pressure over the course of a season and is suitable for road bikes, mountain bikes, BMX, children"s bikes, etc. for inflating balls.