portable usb rechargeable neckband lazy neck hanging dual cooling mini fan sport 360 degree rotating hanging neck fan

usb rechargeable: can be powered by usb port and the fan is compatible with most computers, lap, portable chargers and other devices with usb output. 2-12 hours working time depends on different speed. 3 adjustable speed level: low, medium and high speed level. you could adjust appropriate fan speed by pressing the power button repeatedly. hand-design: this fan is design as a headphone to your hands anywhere.hanging around your neck and take it everywhere.