Used a couple of times. We took with us for traveling with RV. Regular brand new price is $400. VIAIR 400P-RV

From website:
Our 400P-RV Automatic powerful portable tire inflator kit will inflate 275/80/22.5 tires from 80 to 90 psi in just 30 seconds. While the unit is intended for RV use, it can be used for virtually any tire since it comes with accessories for more varied inflating situations than any other portable compressor kit on the market today.
-For up to 35" tires
-Thermal Overload Protector
-Automatic Shut-Off Function
-Primary & Extension Air Hoses
-Vibration-Resistant Diamond-Plate Sand Tray
-Heat Shielded Quick Connect Coupling
-Gas Station-Style Tire Inflation Gun with 160 PSI Gauge
-Heavy Duty Dual Battery Clamps with Inline Fuse
-45-Degree Extended Reach Chuck (For Dual Rear Wheels)
-90-Degree Twist-On Chuck
-Heavy Duty Deluxe Carry Bag