【Cooling Performance】 This neck cooler, with a maximum cooling effect of -14°C, is designed to keep you comfortable even on hot days. The combination of a cooling plate and a fan effectively lowers body temperature. 【Portability】 Lightweight and compact design (146g) makes it easy to carry. It's USB rechargeable, allowing for easy charging anywhere. 【Long-lasting Use】 It has a built-in 10000mAh battery, allowing for approximately 5 hours of use. It provides long-lasting comfort even during cooling. - Brand: THANKO - Product Name: SENA COOL Plus - Maximum Cooling Temperature: -14°C - Modes: Cooling Plate & Fan - Built-in Battery: 10000mAh - Size: 133 x 93 x 28mm - Weight: 146g - Usage Time: Approximately 5 hours (during cooling) - Charging Time: Approximately 4 hours - Power: USB charging - Accessories: Main unit, USB cable - Target: Unisex I purchased this last summer for ¥7,010 and wore it a few times. It wasn't suitable for outdoor field work, so I would like to sell it. Thank you for looking.