Features: [Easy to Carry]You can use this fan: hold it in your hand, or hang it on the neck. Easily get cool wind on a hot day. [Eco-Friendly]Support USB powered. 1.5-4 hours working time depends on speed, can also be charged by computer, laptop, power bank, car charger, etc. [2 Speeds]Gentle wind, and natural wind. You could adjust this rechargeable travel fan freely according to your need. [Cooling]Upgraded simulates natural winds and makes the wind more concentrated, giving you irresistible coolness. [Great Gift]This hand-free necklace fan with powerful airflow makes it a must-have in the summer. The best gift for your friends, family, and child in summer.