Premium set: includes electric ball pump x 1, USB charging cable x 1, ball pin x 2, hose x 1, air valves x 2, storage bag x 1. The self-inflating pump has a built-in 2000mAh lithium battery that is compatible with any USB port for charging. Full charge takes about 3 hours and can take about 40 minutes. It also has built-in LED emergency lights that can provide emergency lighting at night.Fully automatic intelligent air pump: you just need to preset a PSI value, press the start button to inflate, the operation is simple and convenient. This automatic inflator pump is equipped with a professional pressure detection function, the ball pump automatically detects whether the inflated object has reached a preset value, and automatically stops the air supply once it reaches it. The professional accuracy calibration (with an accuracy of over 0.1 PI) makes the use safer for you.Portable and compact design: a compact design designed for mobile use and is so small that it can be held in one hand and stored in your pocket, handbag or backpack. Dimensions: 6.29 x 1.54 x 1.54 inches, weight: 0.88 lbs / 400 g. The simple and stylish design can be used as a gift for your friends who have a hobby of playing.Quick inflation: the mini air pump is equipped with a small but powerful motor that can inflate a basketball in just about 1 minute. With the built-in digital LCD pressure gauge, you can observe the rapid increase in PSI values of the inflated object in real time. Professional inflatable equipment, do not waste time so you can enjoy your training time to the fullest.Application: the portable ball pump is suitable for volleyball, football, basketball, rugby, ordinary swimming rings, balloons, children's toy balls and other small inflatable items. Note: Not suitable for large inflatable items such as bicycle tyres.