Mini USB fan equipped with a holder to hold in the groove while moving. The AD 7331 fan has a 9 cm coulter, it is small and light. Three speeds allow you to decide on the strength of the blowing. It is equipped with a 3.7 V lithium-ion battery with a capacity of 2000 mAh. The device can be connected via the COMPUTER's USB port, phone doormatch or power bank. Battery life is 2-8 hours depending on the selected fan speed. A mini fan is an interesting solution, which will work in any place: home, school, work or while relaxing outside.