This personal fan's blade design and high quality motor maximizes air movement for optimal cooling comfort The Desk Fan easily adjusts speed by t-ouch control so that you have three options (high-medium-low),it will always keep you cool at the low speed, the medium mode can better relieve the stuffiness,the high speed is strong enough to cool you down quickly after heavy sweat. Smart t-ouch provide tailored cooling-off experience, you're worth it It comes with the usb cable that compatible with any USB port, such as computer, power bank, regular socket. This portable fan is powered by USB, faster and safer. The fan has a 2400mAh battery, fully charged battery lasts up to 4~6 hours (depending on different wind speeds and using habit).USB fan is energy-saving and environmentally friendly, no matter where you are, it can provided cool air Perfect for indoor and outdoor use, the personal fan can produce natural wind to keep you cool when reading, doing sports, waiting in line and traveling, it would be your best partner in such hot summer. Material: ABS Charging input: DC 5V/1A Product power: 3W Battery capacity: 2400mAh Color: Dark blue Speed: 3 wind speeds Products include: 1 x fan module 1 X USB charging cable 1 X Specification