AUHMA Portable A5544 Digital Air Compressor Pumper Tire Inflation Pump? Dimension: 108x108x36 (mm) ? Net weight: 498gr? Power: 60W? Input current: 5A? Display unit: Psi, Bar, KPA, kg/cm² * Rechargeable 1. With various accessories, it can inflate cars, motorcycles, electric motorcycles, bicycles and balls with four relevant inflation modes. 2. Real-time tire pressure display, easy to use, one-key inflation: After the tire pressure value is set for the first time, it will be automatically saved in the chip. When inflating again, press the start button to automatically extract the value and start inflating. Tire pressure is preset and does not require personnel monitoring. When the tire pressure value is reached, the inflation will be automatically stopped and the inflation will be more worry-free. 3. It can be turned into a power bank at any time, and USB is universal: Small size, can be used as a portable power bank to charge mobile phones, etc. Operating Instructions 1. Power-on status: the value displayed on the screen is the current pressure after connecting the air tube. 2. To ensure safety, please check the required pressure of the inflated object before inflation to avoid personal injuries caused by over-inflation. 3. The recommended inflation pressure for a car, bicycle or motorcycle tire is marked on the sidewall of the tire. The tire guide is marked near the inside wall of the driver's side door. Inflation pressure is related to load weight. How to Use 1. Connect the product to the inflation hose; 2. Connect the inflation hose with the tire valve that needs to be inflated; 3. Long press the power button for 3 seconds to turn on the device; 4. Preset the pressure value for the tire, press the "+/-" button to adjust the preset tire pressure; 5. Briefly press the power button to inflate the tire; 6. After waiting a few minutes, the compressor will automatically stop inflation when the desired pressure is reached and then turn off.