Features: The high precision alloy allows compression up to 150 psi to measure the necessary air force for road bikes as well as more common bikes. for a portable charger. Does not need to be plugged in power to work. It is compact and lightweight and easy to carry in your bag. It's easy, keep up the pressure. Don'for t worry about pressure when you inflate a ball. Segmented movement for long-lasting use. The motor design allows the air compressor to dissipate heat and reduce vibration for comfort while in use. Specifications: Material: ABS Color: Black Size: Approx. 2.79x4.84inch(7.1x12.3cm) Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Air Inflator