1. Dust removal function: suitable for cleaning dust on the of products such as keyboards, cars, air conditioners, etc. 2. Blowing function can inflate balloons. 3. Outdoor use: cooling, fire and combustion, etc. Quick-drying blower: suitable for blowing hair 4. Vacuuming: No need to install the mouthpiece, just aim at the air inlet of the electric dust collector, gently buckle on the bag valve, start the electric dust collector to start vacuuming. Product name:Violent brushless fan Product size:142x76x33mm Product weight:250g Battery type:lithium-ion battery Charging voltage:5V Battery capacity:2000Ah*2/5C Charging current:less than equal 2A Rated voltage:7.4V Charging time:2Hrs Rated power:50W Usage time:2Hrs Maximum speed:110000RPM Product weight:250g Product size:142x76x33mm Instructions: 1. Power on/off operation: Long the power on/off button (about 3 seconds) to turn on or off the device. 2. Gear switching: After turning on, push the switch up and down to adjust the wind speed. 3. Charging status: When in use, the green light flashes to indicate insufficient power. Please use a 5V/2A adapter Type-C charging cable. The green light flashes slowly to indicate normal charging. 4. Accessory application: The product comes with a mouthpiece. When using it, just insert the mouthpiece directly into the dust collector outlet. Colour:Gray Material:ABS Package Contents: 1 * brushless fan 1 * data cable 1 * brush 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.