Bicycle pump electric mini portable bicycle pump with digital PSI pressure gauge motorcycle mountain bike road bicycle tire inflator

 Please pay attention to whether there is any gas in the inner tube before use.
 1. Inflate the hollow inner tube: first connect the pump to the inner tube valve, then start the pump to inflate the inner tube.

 2. Replenishing the inner tube with air: first start the pump, turn on the inflation mode, and finally connect the pump to the inner tube valve for inflation. 

Note:

Before use, please note if there is already gas in the inner tube
1.Inflating a hollow inner tube: first connect the pump to the inner tube valve and then start the pump to inflate the inner tube.

2.Replenishment of an inner tube that already contains air: start the pump first, switch on the inflation mode and finally connect the pump to the inner tube valve to inflate it.