The Uniden 7-Inch Video Surveillance System (UDS655) is portable, rechargeable and easy to use. It comes with a 7-Inch color 800 x 480 High Resolution screen. The system is expandable up to 4 cameras and has a built-in microphone and night vision with 40-feet of range. It has multiple recording options: Scheduled, Manual, and Motion. The included 4GB MicroSD card, gives you up to 40 hours of recording.