The Ninety7 Sky Portable Battery Base for Amazon Echo 2 in Carbon is a black wireless audio dock that is designed for direct fit compatibility with Amazon Echo 2 models. It allows users to easily charge and power their Echo 2 while on the go, making it a convenient and stylish option for portable audio playback. Perfect for those who want to enjoy their favorite music and podcasts anywhere, this portable audio dock is a sleek and practical addition to any tech-savvy individual's collection.