Multi Functional Rechargeable Hanging Mini Fan 3 Speeds Handheld Portable Fans Home Office Travel Air Cooling Desktop USB Fan|portable Fan|mini Fanhandheld Portable FanProduct Can be hung on the neck with string; Quiet and Low noise, brings calmness to your agination heart3 Gears wind power (can adjust the wind speed as you like); Turbofan, strong wind power, long life intelligent controlCan work for 2-6 hours when full charging, ABS material(energy conservation and environmental protection), 3.8cm thickness convenient to bring for ourdoorMulti-functional Mini Rechargeable Fan powered by 18650 lithium rechargeable battery (can be recycled), convenient to carry anywhere and anytimeUSB charging port can be connected with computer or power bank; Good for running, sporting, camping tent, office and study, outdoor hikingSpecifications:1. Input Voltage: 5V2. Input Current:0.5-1A3. Output Voltage:5-9V4. Speed Mode: 3 ranges5. Working Time: 2-6 hours6. Dimension: 120x88x38mm7. Output Power (max): 4.5W8. Charging Time: about 4 hours9. Weight (including battery):185g10. USB charging port can be connected with computer or power bank; Good for running, sporting, camping tent, office and study, outdoor hiking