1. Auto Shut off function: stops when the preset pressure is reached. 2. Bright LED light: helps you see clearly in emergency situations at night 3. Digital tire pressure monitor: monitors tire pressure at any time 4. Built-in lithium battery: It can be charged with power bank(via the MICRO-USB cable) 5. Powerful, multi-purpose: Compatible with a variety of nozzles, suitable for a variety of items to inflate, like pro-bike tires, home use car tires, motorcycle tires, electric bicycle tires, balls, swimming rings, inflatable toys and other inflatables. Specification: Inflation pressure range: 150 psi Accuracy: 0.2 bar Cylinder material: all aluminum alloy Aeration amount: 15L/min Screen: HD LED digital color screen Battery capacity: 4000 mAh (car-grade 18650 battery pack) Working voltage: DC+5V, 2A (input) DC+5V, 1A (output) Charging port: Micro-USB Storage temperature: -20 - 70 Trachea length: 17 cm Product size: 12*7.8*5 cm Product weight: 430g Note: a: When fully charged, you can inflate 4 tires for the car, or fill 2 empty tires . b: When fully charged, you can inflate 6 tires , or fill 4 empty tires . c: When fully charged, you can replenish 12 wheels of the bicycle or hit 8 empty tires.