Cool vest equipped with four Peltier units, capable of cooling to -20°C and heating to 50°C. - Model Name: PV111 - Set Contents: Peltier Vest Set - Number of Fans: 4 - Battery Capacity: 10,000mAh - Cooling Temperature: -20°C - Heating Temperature: 50°C - Input Terminal: USB Type-C - Size: XXL Thank you for viewing. It's a great deal since it's never been used, so don't miss out!