Review on ICARMAINT Mini Tire Inflator - Portable Air Compressor with 3000mAh Lithium Battery, Digital Gauge LCD Display, LED Light, 140 PSI - 110V AC/12V DC Air Pump for Car, Motorcycle, and Bike by Jerardo Phi

Once you understand the instructions, the pump works perfectly. After playing around with it for a while, I wrote my own. I've included them below, which include tire inflation instructions. ICARMAIN Wireless Portable Air Compressor Make sure the battery is charged. Press the power button and check the battery indicator. To turn off the display, press and hold the power button until it turns off. To charge the battery, connect the charger to your pump and to a power outlet. It is fully charged when the indicator turns green. It can also be charged via the charging socket in the car. Cables are available for both. Do not use the pump when connected to 110 volts. Can be used when connected to a car. For use. To start, press the power button. Wait for the screen to change to show the print. Press the on/off button repeatedly until the desired pressure unit appears. Press and hold one of the set buttons until the pressure units flash. Then set the desired pressure by pressing the Set -/Light or Set +/Moto button to set the desired auto-off pressure. Plug in the hoop and press the Moto button. It switches off at the set pressure. You can check the pressure on the display while pumping and stop the pump by pressing and releasing the Moto button. When the pump starts and you want to stop it, short press the Moto button. Press the Set/Light button to turn on the light and change the light to Blinking, SOS or Off.