Featuring two-way audio communication and built-in recording capability, the MobiCam Digital DXR Monitoring System provides versatile, portable surveillance for the home or office. A high-resolution, 3.5-inch color LCD monitor receives audio and video from up to 450 feet away, and provides night vision up to 40 feet. It can also record transmissions directly to an SD card (card sold separately), ensuring you never miss a moment. The Quad Split Screen option allows you to monitor up to four cameras at the same time, giving you exceptional oversight of your home or business (additional cameras sold separately). And with its compact design and rechargeable battery, the system is easy to move from room to room or away from home.