[UNIQUE DUAL PISTON CONSTRUCTION] With a dual piston construction, this bike pump has two pumping techniques to ensure that it continues to inflate quickly under extremely high pressure. In volume mode, both pistons can move, increasing inflation speed by 35%. If the resistance is too high, setting the bike pump to high pressure mode can reduce energy by 35%. It continues to inflate rapidly under high pressure. [EXTENSION TUBE + ACCURATE GAUGE] The pump has a long, flexible hose that can be used in any position, no matter how comfortable. The tires are efficiently inflated to a high pressure of up to 120 PSI / 8 bar. Unlike a mini bike pump without a gauge, you can see the tire pressure from the data displayed on the gauge to accurately inflate your tires. [EASY TO CARRY] Our portable bike pump is 27.5 in length and weighs only 165 es. It is made from strong aluminum alloy and durable hard plastic. Bike inflator length and weight is only two-thirds of comparable products, which is quite compact. Bike pump can also be attached to cycling gear and backpacks, making it particularly suitable for professional cyclists. [COMPATTIBILITY] As our hand pump is equipped with 3 valve configurations, our hose to one head allows quick change of Presta and Schrader and Dunlop valves. Likewise, the secure valve connection with metal thread ensures optimal sealing. Bike accessory lasts twice as long as conventional valves. [COMPLETE ACCESSORIES, MULTIPLE ADVANTAGES] 1 mini-pump + 1 adapter + 1 air nozzle + 1 ball needle + 1 mounting bracket + 1 grinding tablets + 2 screws + 4 thread patches.At the same time, it has several advantages"Dual piston system", "Extension pipe", "Precise pressure gauge" , "Light and easy to carry", "Easy change between 3 types of valves".