DOSHISHA Portable Fan Neck Fan Hybrid Tempo (Tempo) Power Supply Compatible (Rechargeable/USB) Gray Cool in summer, warm in winter, all-season対応. Peltier neck cooler & heater. By applying a plate using a Peltier element to the back of the neck, it regulates body temperature. For safety and health, the COOL&HOT plate automatically stops operation after 15 minutes. Supports two power sources (rechargeable/USB power). Charging time: Approximately 5 hours, Usage time (approx.): Strong (2 hours), Medium (3 hours), Weak (7 hours). Built-in rechargeable battery: 3-stage air volume, USB: 2-stage air volume. Only tried on once, in excellent condition. Please understand that this item has been stored at home. #DOSHISHA #doshisha #NeckFan #NeckCooler #NeckHeater #tempo #Tempo