The air pump is designed for mountain bikes, road bikes, crosscountry bikes and other bicycles and basketball, soccer, rugby and other ball emergency inflatable and developed, but also applies to ordinary bicycles and other products. Features: Compact and PortableUltra portable mini bike tire pump is super small, easy to carry, takes up less space in your backpack, you can even put it in your pocket. With it, you can inflate your bike tires anytime and anywhere, it is a musthave for bike cycling adventures. Three Preset Tire Pressure ModeUsing three preset tire pressure mode 100psi45psi8psi for ball (8psi), road bike (100psi), offroad bike (45psi) three buttons. Users can inflate the inflatable object by pressing to the corresponding button, when the air pressure reaches the preset air pressure value of the system, the air pump will automatically stop inflating. Powerful Inflation & Quick ChargeMaximum air pressure 100 PSI, bike electric air pump can inflate three bike tires from 8 PSI to 100 PSI with a fully charged pump, protecting your ride for any emergency. In addition, it only takes 2 hours to fully charge the inflation portable bike pump, please fully charge it before using it for the first time. RealTime Air Pressure Digital DisplayDigital pressure gauge of small air compressor portable displays the inflated air pressure value in real time, easy to read digital format, you can monitor the air pressure of your tires at a glance and ensure accurate inflation every time. MultiFunctionalEquipped with accessoriesball needle, presta valve adapter used to road bikes, mountain bikes, crosscountry bikes, basketballs, soccer balls, volleyballs, swimming rims, inflatable toys and so on. Specifications: Material: ABS Color: Black Measuring Range: 8~100PSI Measurement Accuracy: + 1.5PSI Temperature Range: 0 celsius 50 celsius Operating Current: 7.4V5A Input Voltage: 5V1.5A Maximum Current: 10A Charging Interface: TypeC Charging Time: 2 hours Unit Selection: Key to switch the unit PSI Scenario Mode: Ball 8PSI, ordinary bicycle 45PSI, road bicycle 100PSI Battery Capacity: Polymer battery 802540, 500mAh*2, 15C power battery Battery Low VoltageHigh Voltage: 8.3V 6.3V Battery Usage: 800 chargedischarge cycles Motor Working Life: 6001200H Inflation Speed: 20Lmin  Working Time: Single continuous work 1015min  Working Noise: Distance 1m less than 85dB  Item Size: 72 * 52 * 34mm 2.83 * 2.05 * 1.34in Item Weight: 167g 5.89oz Package Weight: 337g 11.88oz Package Size: 14.5 * 10 * 5cm 5.71 * 3.94 * 1.97in Package List: 1 * Bike Pump 1 * Air Tube 1 * Presta Valve Adapter 1 * Ball Needle 1 * TypeC Charging Cable 1 * Storage Bag 1 * User Manual (English)