The Blink Sync Module BSM00200U is a wireless connectivity device designed for use with Blink home surveillance cameras. This module allows for easy setup and syncing of multiple cameras within the same network, enabling a seamless viewing experience. It is compatible with other Blink devices and is ideal for expanding the surveillance system in your home. This model does not come with a battery included, making it a convenient and reliable accessory for enhancing your home security setup.