Electric fan designTable Fan Power SourceBattery Powered Recommended Uses For ProductOffice, Travel, Indoor, Home Mounting TypeDesk Fan,Table,Freestanding Controller TypeButton Control 1. Both Handheld and Hand Free - Easy removable base offers both a convenient handheld fan for outdoors as well as a steady hand-free fan for indoor on the desk, table. 2. [Speeds Adjustable]: This mini handheld fan has adjustable speeds which can be switched easily by pressing the button. soft breeze at that can accompany you sleeping quietly. Medium speed for cool wind, and high speed produces strong airflow at rotation speed, helping you cool down in seconds. 3. USB Rechargeable Battery]: Rechargeable battery ensures mini fan's high performance and high efficiency, longer battery use time, safe charge, and less power consumption. Get charged by USB devices such as powerbank, computers, laptops, and USB charger, which is able to continue work when connecting with a USB power supply. 4. Removable Fan Stand - With the removable fan stand , You can use it as desk fan in your office or can be used either handheld fan to carry it around to solve the hot stuff on the road. 5. PORTABLE& LIGHTWEIGHT DESIGN:When you go outside, you can put it in the bag with you,especially suitable for summer travel or outdoor sports, you can take it to anywhere,like NBA/World Cup Qualifiers/Football Game/or activity.