Review on Effortlessly Inflate Your Bike Tires With BriskMore CO2 Inflator And 12PCS X 16G CO2 Cartridges - Suitable For Presta And Schrader Valve, Ideal For All Mountain And Road Bicycles by William Lin

Great little portable air compressor when a C02 cartridge is screwed into it. Bit of trial an error when your only adding five two ten pounds of air. Didn't want to over inflate tire so 7 pounds of air took about ten minutes. I kept sticking the tire gauge on it to see were I was at. After a few times of adding air you get a pretty good idea of how long it takes.This is a solid and well made inflator. The Cartridge screws in till it's snug and your ready to go.