Lightweight and Portable: Made of plastic case and high-quality battery, it is durable, and stylish. It has an great touch, it's perfect for indoor and outdoor use, and it's easy to carry. 2 in 1 multi-function: built-in 2400mAh battery, USB interface, this product is not only an electric hand warmer, also a power bank. TWO ADJUSTABLE TEMPERATURE MODES: This pocket hand warmer has 2 temperature modes (It heats up quickly in a second and gives you instant heat. Perfect Gift: The best gift for cold , perfect for family and friends, Christmas, New Years or winter. Safety: The optimized circuit extends the lifespan of the pocket hand warmer and provides protection from over-discharge, over-charge, overheating and short circuit. battery capacities: 2400mAh Colour:White Material:plastic Package Contents: 1 x Hand Warmer 1 x Usb Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.