This product uses a built-in 18650 battery with a rated voltage of 11.1 V The product has lighting and flashing light functions 5V USB-c charging port for convenient charging USB output for convenient charging of other devices The product has a battery level display and a pressure digital display for easy operation. The air pressure can be preset and the product automatically shut down. It comes with 4 standard pressure values under functions, and you can operate it directly even if you don't understand the pressure. The product can detect tire pressure. [Product Name]: Wireless Air Pump [Battery Capacity]: 18650*3*1800mAh 11.1V Built-in Battery Protection Board [Working Voltage]: 11.1v [Piston Diameter]: 19mm [Metal Cylinder, Metal Gear] [Product Power]: 75W [Accuracy]: 1.5psi [Air Volume]: 20L/min [Continuous Working Time]: 8-10min [Time]: 1. Idle for 40 minutes when fully , 2. Can charge 195 specification tires 0-36PSI 2 and a half tires 3. [Type-C Charging Cable]:About 80mm [Charging Time]:Charging Time:3-4h [Using Temperature]:-20-60 Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly, Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:As Shown Material:plastic Package Contents: 1 * Wireless Car Air Pump set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.