This clip on desk fan with stepless speed can let you adjust the wind speed at will. 2200mAh 18650 battery (INCLUDED) or USB powered, ensure you 2.5~6 hours working time for fully charging. The mini fan can swivel and angle up or down for 360 degrees. Clip on car ,bed ,desk ,tent. Feature: 1Portable clip to anywhere 2Stepless wind strength adjustment 3Rechargeable battery, environmental friendly 4Angle Adjustable: 360 degrees 5Quite lightweight, and between the wide clip and the adjustable fan angles the clip is pretty strong Specifications: ★Material: ABS Plastic ★Input voltage:DC 5V ★Output voltage:DC4V-6V ★Output current:0.35A-1A ★18650 Battery voltage:3.7V ★Battery capacity:2200mah ★Wind power at 1M:＞2.5m/s ★Effective distance:＞2m ★Power supply:USB/18650 Lithium battery(included) ★Dimensions:190×150×100mm ★Weight:270g Note: ★Please REMOVE the plastic insulation of the battery and fully charge the fan before firstly using. Package includes: ●1 X BestFire Portable Clip-on fan ●1 x 18650 Li-on Battery ●1 X USB Charging Cable BestFire brand products have been well tested before delivery, but we cannot 100% guarantee the items when delivered to you . Any problem please feel free to contact us through Amazon Email System and we will do our best to serve you .