Okay, just buy the damn thing and thank me later. This is great quality and will change your life if you have an inflatable SUP. Picture this: 98 degrees in the dry Colorado heat, impatient kids gathered asking how long until the paddle boards are ready, and you're out of breath and sweating like a sinner in church while you Your 400th down. NO THANK YOU. Since that purchase I've started the truck engine, connected one end to the truck's power supply and the other end to the paddleboard, set the digital readout to read 15psi and relaxed in the shade while watching the SUP inflate, while holding an ice cold long neck beer (which never broke my heart - Luke Combs). Don't waste a day without your electronic pump.