Astro Pneumatic 3070 Portable Nitrogen Tire Inflation Cart. FEATURES: Adjustable over pressure settings (OPS). Automatic purging programs (N2P). Vandal resistant mechanical switches. Safe, Accurate and Easy to use. Li battery operation. Power saving auto power off. Large backlit LCD display. Inflate up to 4 tires simultaneously. Ceramic sensor accuracy to: +/- 0.02Bar/0.3Psi/2kPa/0.02KGF. Unit uses standard Nitrogen bottle or direct Nitrogen air supply from generator or air compressor. Inflation Range: 0.5-10bar (1000kpa/145psi/10kg/cm2). Accuracy: +/-0.02bar (+/-0.3psi). Max Inlet Air Supply: 10.5bar (150psi). Nitrogen flow: 105.944CFM. Supply voltage: 12V battery. Watt: 12W Max. Working Temperature: -10℃60℃ (14℉140℉). Relative Humidity: up to 95-Percent RH non-condensing.