Currently sold on Amazon for around 14,000 yen. I only tested the operation before listing it, but it was surprisingly cold. The cooling part is quite large and very cold. Since this is a personal sale, I cannot offer any warranty. Shipping included. Peltier vest with a maximum cooling temperature of -28°C and a 20000mAh battery. - Cooling area: Maximum cooling area - Cooling temperature: -28°C - Battery capacity: 20000mAh - Operating time: Approximately 5-6 hours (-28°C) - How to use: USB connection - Cooling system: Uses the same system as a refrigerator - Generation: Third generation Thank you for viewing.