Rechargeable Wireless Hair Dryer Negative Ion Hot and Cold Wind Versatile Hairdressing Tools1. Wireless hair dryer, large air volume, quick drying, tens of millions of negative ions, smoothing frizz2. 500W high power, quick drying and smooth without damaging hair3. Stable motor, noise reduction design, temperature control protection, automatic power off, considerate and safe4. Two wind temperature levels, 1 level cold air battery power supply, 2 levels hot air socket power supply (charging and plugging are prohibited at the same time)5. Built-in lithium battery, USB interface fast charging, quick and convenient to use on business trips6. Cold air power 40W, hot air power 500W, rated voltage 220V50HZ7. Battery: 3.7V, 2600mAh8. Battery life: 40 minutes