Compatibility - Works with Echo Show/Echo Spot/Fire TV and Google Home Hub/Chromecast so you can watch or turn off live video streaming with a simple voice command | High resolution 2K with color night vision - High quality 2K (2560 1440) resolution with full color night vision up to 98 feet; | Bidirectional voice with built-in alarm beep - Use clear bidirectional voice to communicate with the person in charge of the delivery at your door or use alarm beeps to scare intruders | Motion Detector Technology and Activity Areas - Dedicated activity areas and notifications will be sent to your phone as soon as any movement is detected. | SD Storage Card - Supports local storage with a microSD card with a capacity of up to 256 GB (SD card not included). . Connection Technology: Built-in Wi-Fi