wired
one
It is best to use a wired car air pump, because the wireless built-in car air pump is very unsafe in the high temperature of the car. Wired car air pump charging speed is faster, but the length of the power cord is not enough, will be limited, but basically can meet the normal use of most cars, so it is best to use wired car air pump, safety is more reliable.
two
Due to the limited battery capacity, the wireless can not work for a long time. The air pressure is insufficient and the wireless air pump connection is unstable. An onboard air pump with wires is recommended.
Personal recommendation with cord. Even if your fully charged car pump is in the car for backup, the power will run away by the time you use it. You need to take it out every so often to test the charge. You never know when you'll be able to inflate your car, not in six months or a year. And the wireless built-in battery isn't even safe in the car in the summer heat.