Product feature:
1.4CH digital wireless camera & DVR system
2.Simple installation- no cables required
3.Total digital wireless , no interferences, no privacy leak
4.7" LCD monitor with integrated video recorder
5.Support up to 32GB SD card and external (not include)
6.Support 4 cameras/ 24hours/7days  non-stop overwrite recording
7.Multiple recording modes: manual, schedule ,and motion activated
8.15meter night vision range
9.Video quality: 4CH  VGA 10fps , 1CH  VGA 30fps
10.Weather proof outdoor cameras with 300m/1000ft transmission open range
11.Video output function for bigger monitor          http://www.doorbellalarm.com/