Easy change chuck system, 1 button operation, Auto shut-off for increased battery life, Displays KFG, BAR, PSI, KPA measurement, Large face LCD digital read-out, Unit covered with rubber sleeve for extra comfort and durability, On-Power button, auto shut off in 90 seconds if not in use, LCD Back Light, Two position levere, 1st position deflates, 2ne position inflates, With 21″ hose.