Features: 1. Auto shut-off function: It stops when the preset pressure is reached. Auto shut-off function is more safe. 2. Bright LED light: LED light helps you see clearly in emergency situations at night. 3. Digital Tire Pressure Monitor: This air pump can monitor tire pressure anytime. 4. Built-in lithium battery: It can be charged with external battery (via the MICRO-USB CABLE). 5. Portability: This product is small in size and light in weight, which is very convenient to carry around. Description: It is compatible with a variety of nozzles, suitable for a variety of inflatable items, such as pro bicycle tires, home use car tires, motorcycle tires, electric bicycle tires, balls , swimming rings, inflatable toys and other inflatables. Specifications: Input voltage: charger 5V is greater than 2A Maximum current: 5A No-load current: