Features: 1. Support any USB ports of PCs & notebooks 2. Plug and play with ON/OFF switch 3. 2 wind-speed levels set 4. with wind-power direction adjustable 5. Low noise, low power consumption, super mute 6. 2000RPM rotate speed motor and 4pcs aluminum blades bring your cooling quickly 7. Color available: Black 8. Compatibility: Able to power from a USB Type A port, such as an office desktop, laptop, power bank, or a cell phone charger 9. Cable is included: USB Type A male to 4.75 mm barrel connector; 44 inches long 10. Power adapter is sold separately (not included)   Technical Data’s:   1. Power supply: 5V USB   2. Operating temperature:-30 to 60 degree   3. Operating humidity: less than 85%   4. Storage temperature:-20 to 45 degree   5. Storage humidity: less than 95%   6. Item dimension: 145*100*155mm 7. Fan diameter: 96mm   8. Boxed-Product Weight: 350g   9. Power consumption: 2.5W   10. Wire length: 1.2m   11. 360 degree tilts adjustable head for flexible use Instructions:   1. Please put in the place where children cannot reach.   2. Please turn off the power switch and pull away from the plug to USB socket when there is sparks or smoke occurs.   3. Do not open the fan when it is working.   4. Do not touch with wet hands.   5. Do not put it in moisture environment   6. Do not put it on a unstable place   7. Removal of it when the power outage. Hold down the plug pulled.   8. Long-time if it does not use, please pull the plug from the USB socket.