All the great features of the Mountain X with the added precision of a 3.5" LED digital gauge and Topeak's TurboHead pump head. Huge 722cc stroke volume from an over-sized steel barrel inflates high volume tyres nearly 50% faster than normal floor pumps. Topeak's TurboHead pump head delivers high airflow for Presta valves. With an easy on-off design there's no loss of pressure when removing the head after inflation.  Oversized 44.4mm steel barrel and durable steel base Oversized padded handle provides a comfortable grip TurboHead pump head fit Presta valves LED Digital Mid mount gauge / 60 psi 4.13 bar max pressure CR2032 batteries x 2 VOLUME PER STROKE: 722 cc Steel barrel and hardened steel base Height: 72 cm  Hose: 65 cm 3" LED DIGITAL GAUGE Offers accurate values and instant readability even in dimly lit environments. Offers selectable units: psi bar and kg/cm2 TURBOHEAD Delivers high airflow for Presta valves OVERSIZED BARREL Inflates nearly 50% faster than normal floor pumps