The Blink Outdoor 4 Battery Extension Pack is a black, weatherproof accessory designed specifically for the Blink Outdoor 4 Security Cameras. This battery extender unit is compatible with Blink cameras and provides power for up to 4 cameras, with a maximum resolution of 1920x1080. Its smart home compatibility with Blink systems allows for easy installation and operation. With a sleek design and reliable performance, this battery extension pack is a practical and efficient solution for enhancing your home surveillance system. No outer box. Any questions please message me. Thanks