This small electric pump weighs in at 1 lb and fits great in any bag. Simply set your desired PSI, click the power button and it will automatically turn off at the desired PSI. It has multiple PSI presets you can program and can also function as a power bank. This pump makes it super quick and easy to make adjustments when switching between road and trail, and if you have a little sealant in your tire, you can pump up and get rolling again in the event of a puncture.