Innovative floor pump with 3 stage design that achieves both high pressure and high volume in record time. Stage 1: Both barrels open - High volume with little effort. Stage 2: Main barrel - High pressure up to 120psi. Stage 3: Small barrel - Super high pressure up to 260psi . Two tone padded ergonomic handles. Wide stable base with 4` easy to read analog gauge. SmartHead DX1 automatically adjusts to fit Presta or Schrader valves without any extra bits adapters or switches. Low profile air release button for fine tuning