9 Inch Mini USB Desk Fan, 3 Speeds, 10 Fan Blades,Dual Modes with Aromatherapy box ，USB Powered ONLY , Perfect Fan for The Office and Home Foruisin USB DESK FAN Never stops as it is powered by USB fan. Less than 40dB and keep a quiet environment for your work and sleep. Great airflow which cool you down very quickly. DIRECTION FOR USE: 1.Long press switch toggles single and double turbine modes. 2.Single and double wind turbine model can be used for wind speed of three gear. 3.The rear shell can be filled with aromatherapy tablets or cotton. ★★★★ Adjustable speed level and 2 modes (Single and double wind turbine) Single wind turbine Once time: first gear – 0.4A/2W Second time: second gear – 0.6A/3W Triple time: third gear – 0.7A/3.5W double wind turbine Once time: first gear – 0.8A/4W Second time: second gear – 1.1A/5.5W Triple time: third gear – 1.4A/7W SPCIFICATION: Color: Silver Weight: 325g Material: ABS+Silicone Size: 232*50*118mm Voltag: 5V Current: 0.4-1.6A Power: 2W-7W PACKAGE LIST: 1* A fan 1* USB cable fixed fan link 1* One wood pulp chip (for user essential oil) 1* User Manual Attention: Please note that this fan is only powered by USB cable. No battery or AC Adapter is included.