XMSJ | CYCLAMI A3 MAX 150PSI Electric Bike Pump Mini Portable Rechargeable Tire Inflator Aluminum Alloy Smart Road MTB Presta Valves

Before use, please note if there is already gas in the inner tubeThere are 2 cases as below： 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.Please use the original charging cable when charging