85P is a small portable compressor with a built-in LED work light, capable of inflating up to 31-inch tires by simply plugging into your cigarette lighter power port (14.5 amps max.). Connect the screw-on tire chuck to a tire valve stem before turning the unit on. Tire pressure can be monitored using the gauge incorporated into the top of the unit. 120 PSI Pressure Gauge LED Work Light / Power Indicator Solid Brass Twist-on Tire ChuckAccessory Power Plug 3 pc. Inflation Tips Kit .