With specifications more akin to a suspension fork than a traditional pump, the SuperPista combines a full metal shock piston design with the classic Italian leather plunger washer and self-lubricating linear bearings to create the highest efficiency, smoothest running SuperPista to date. Efficient, accurate, durable are the trademarks or the SUPERPISTA DIGITAL floor pump. Instructions - Either Manually press the power button on the display or begin pumping. The display will auto-on and time-out after use. Pressing the power button while active, changes the unit of measure. The control buttons adjust the target pressure alert. If over-pressured, the display will show an error. Releasing air will reset.