According to various tests, the BTP 12A electric sup board pump is one of the best battery-operated sup pumps on the market. It impresses with an integrated, high-qualit high-performance lithium-ion battery and a digital charge level and pressure display. The air pressure is continuously adjustable up to 4.5 PSI / 1bar. To pump volume, it only starts in the quiet fan mode and only then switches to the somewhat louder compressor mode. Additional futures are 2 USB ports and three integrated LED lights.The Sup Pump has an attractive design, works reliably and is easy to use. The high-quality battery makes the pump a sustainable overall package.