Feature: 1. Universal Compatibility: This battery constant temperature heating insulation bag is designed for NEO for Avata series drones, with a dual compartment design that can hold 2 to 3 drone batteries at once. 2. Long Lasting Use: Made of water resistant membrane on the outside and EVA material with insulation cotton inside, providing protection and cushioning while keeping the batteries warm. 3. Constant Heating Function: Equipped with built in heating function and USB A interface, allows for heating using power bank(not included) or adapter(not included), maintaining batteries within safe temperature range, prevent the battery from being abnormal due to too cold. 4. Extreme Cold Protection: Specifically designed for extreme cold weather, this UVA battery warming bag is ideal for outdoor flights in freezing temperatures, convenient to use with power bank for on the go warmth. 5. Easy to Carry: Featuring a hand strap on top and side hooks for hanging, lightweight and compact size makes it ideal for travel and outdoor use, reducing the burden of carrying. Specification: Item Type: Drone Battery Constant Temperature Heating Bag Material: Nylon, EVA Power: 10W Working Temperature: Approx. -22℉ - 68℉ Rated Voltage: 5V Interface Type: USB A Size Excluding Handle: Approx. 210x160x105mm / 8.27x6.30x4.13in (Please allow 10MM error.). Package List: 1 x Storage Bag 1 x User Manual