Semiconductor cooling neck hanging fan F21

Light color: colorful dazzling

Input voltage: 5V-2A

Display screen: LED display screen

Battery capacity: 3.7V-4000mAh (18500 lithium-ion battery)

Fan gear: 3

Refrigeration temperature: 11-16C

Charging time: ≈ 3 hours

Usage duration: 3-7 hours

Light mode: 3rd gear mode