The Bestway Air Hammer™ Sport High-Pressure Manual Air Pump inflates tubes, air mattresses, rafts, toys and many high pressure items such as boats, kayaks, stand-up paddleboards (SUPs) and more! Designed to provide maximum airflow, this pump has a stroke volume of 1.8 L/cycle (one-way), 3.45 L/cycle (two-way) and features a large air chamber for rapid inflation. This means it delivers a continuous stream of air on both the up and down strokes, so you're able to fill your items faster than single-action pumps. If adventure is your goal, this pump travels well – you can inflate your items on-the-go and won't need an electrical plug! The Bestway Air Hammer Sport High-Pressure pump also features an easy-to-read display with a built-in pressure sensor to make sure all your items are filled to their designated PSI. Plus, five universal valve adapters are included to fit nearly every inflation valve, so you're able to inflate a variety of items (with different pressure thresholds) using the same Bestway Air Hammer pump!