3 in 1 Neck Air Conditioner, 6000Mah Portable Neck Fan with 2 Metal Cooling Plat
For example: 1. Refrigeration (3 speeds) | 2. Heating (3 speeds) | 3. Fan (3 speeds) | 4. Refrigeration (3 speeds) + Fan (3 speeds). Besides, 6000mAh large capacity batteries provide 4-18 working hours duration (depending on different speeds).