"The Astro 3018 3.5" Digital Tire Inflator with Hose boasts a durable 21” stainless steel braided hose for increase durability and an easy to install AAA Battery System for 4X the battery life. Inflate, deflate and measure in KG, PSI or BAR with maximum accuracy and 0.1psi resolution for use with TPMS (Tire Pressure Monitoring System). This unit is designed with a large face backlit LCD digital read-out and is covered with a rubber sleeve for extra comfort and durability. Specifications: Measuring Range: 3 175PSI, Units: PSI/BAR/KPA/KGF, Resolution: 0.1 PSI, Accuracy: 0 – 58 psi /- 1.2 PSI, 59 – 174 psi /- 1.2 PSI, Working Temperature: 32°F104°F (=0°C 40°C), Power: (2) AAA Batteries, Battery Lifetime: 560hr"