Astro Ai's newest digital inflator. Works up to 250 psi. Large color digital screen. Includes compressor accessories shown. Battery included. The air chuck also locks onto your tire stem to make inflating at night, tough angles, or difficult places, a lot easier. There is also a deflate button in case you put in too much air. Please remember that this must be attached to a compressor and just buying this unit will not inflate a tire - you need this piece as well as an air compressor to inflate a tire.