USB PORT: The fan runs when plugged to the solar panel. And it can be used alone by plugged into computer USB port.
POWER BANK: The solar panel can be used separately as a power bank to your mobile phone.
EASY TO CARRY: Portable and lightweight, suitable for traveling, self-driving , camping, hiking and other kinds of outdoor activities.
SOLA RPANEL: When plugged to the solar panel, how the fan works depends on the sunlight. When the sunlight is strong, the fan works fast. When the sunshine is not strong enough, the fan may work low or even does not work.
NOTE: There is no rechargeable battery in the fan. If you need the fan works at night, you can use a power bank.