I bought a fumpa and it had issues immediately. I could only inflate for a few psi before it would fail. Had to plug it back in to power to reset the pump. Told them the same information and they wanted to send me a new one. I have given up on the experiment. I rarely need them on the road. Carry emergency CO2 only. I fill before each ride to maintain accurate psi levels. Tubeless on all my bikes. They seemed perplexed (fumpa) that anything had every failed. I just wanted my money back and they were pretty pushy before they relented. I wouldn't buy another one of those and Amazon seems littered with trash versions. I went with fumpa as it was made in America. Oh well. Maybe in a few more years they'll be more reliable. Super loud too. I have a Ryobi battery pump with digital gauge that you set desired psi. It was quieter than the fumpa and use that before every ride.