Features: Universal UAV battery model aircraft battery constant temperature heating bag, long time constant temperature, large capacity storage. Build in heating function, external USB port, can be used for heating through mobile power or plug. Special thermostatic bag, outdoor cooling device, ensuring stable operation of equipment in extreme weather conditions. Quality EVA lining, middle insulation cotton, shock absorption and drop resistance, double protections. Double grid design, capable of accommodating 2-3 UAV batteries. Portable handle design, easy to carry without burden. Specifications: Material: EVA Color: Black Size: approx. 160x105x245mm/6.29x4.1x9.6inch Applicable Model: for Air 2/Avata/Mini 2 and more Package Includes: 1pc Battery Constant Temperature Heating Bag note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.