This is a Prestacycle Digital Air Compressor Inflator. Features: Updated digital model with Rapid Response gauge shows immediate changes in pressure with supreme accuracy Attaches to air compressor to inflate tires in seconds Gauge functional even when not connected to air compressor Perfect for low pressure readings on fat and tubeless tires Designed with a variable rate trigger and digital pressure gauge Equipped with Quick-Click2 head for tubeless and removable cores, Schrader auto head, and safety blower tip Compatible with both Presta and Schrader valves Safe for operation up to 255 PSI Additional Attachments sold separately