• 4000mAh large capacity batteries provide a long working time
• Built-in fourth-generation TEC chip, bringing excellent cooling effect
• When using the fan, you don't have to worry about your hair getting caught on the fan blades
• USB rechargeable neck fan, convenient to charge via computer, cell phone charger, power bank, laptops, etc
• 3 wind speed adjustable, easy to adjust the appropriate fan speed
• Best partner for work, office, reading, sports, travel, hiking and cycling when in summer

Specification:

• Material: ABS+silicone
• Product size: 215.8*172.5*58mm
• Net weight: 400g
• Input current: 2A
• Input voltage: DC 5V
• Battery capacity: 4000mAh 3.7V
• Certification: CE, FCC, RoHS