NAFUJAT Industry's First Peltier Cooling Backpack, Dual-Use, -21°C to 50°C Temperature Adjustable, 20000mAh, Back Cooling, Heat Relief, 20L

The industry's first cooling and heating backpack! Instant cooling to approximately -21°C! Instant warming to approximately 50°C! Equipped with cooling and heating pads in four locations on the backpack! Three temperature settings: Cooling mode (strong: -21°C, medium: -18°C, weak: -15°C), Heating mode (strong: 50°C, medium: 45°C, weak: 40°C) Includes dedicated accessory (large capacity 20,000mAh/3.85V). ●Complies with the Electrical Appliance and Material Safety Act. PSE certified. Quiet operation, suitable for any occasion! Includes a 6-month warranty.