Silent motor: the fan is silent in strong winds, so it won't disturb you or those around you.

Three-speed control: flexible and resistant three-speed wind speed control that can be switched at will.

you can charge it simply using a usb cable.

• Weight: 7 ounces (200 g)
• Battery Capacity: ~7 hours (4500 mAh)
• Battery Type: Rechargeable

CoolerClip™ is a wearable fan powered by rechargeable battery that clips onto your waist, delivering a steady stream of air under your shirt for instant cooling. Its targeted airflow design efficiently reduces body heat, providing relief from the summer warmth in a discreet and convenient manner.

Yes,

Mobile phone charger function: you can use a fan to charge your mobile phone in an emergency.