3 modes: off, slow or fast

Occupy small room, smart shape, cool and soft wind

Can use USB mobile phone charger as power adaptor Or use rechargeable battery (including) Plug in to Laptop / Note book / Computer / Tablet / ipad
Specifications:

Input voltage: 5v

Input current: 0.5-1A

Output current: 0.5-1.5A

Output voltage: 3.5-3.9v

Charge current: 500-600mA

Charging Time: 4-5 hours

The battery fully charged, you can use about 1.5-2 hours With battery
anti-reverse, anti-anti charge protection Anti voltage protection function with battery