VideoSecu 2 Channel Mini DVR Motion Detection MPEG-4 Portable Audio Video SD DVR Recorder for CCTV Security System Cameras Home Surveillance DVRSD20 A25 2 CH Video Input Mini DVR, 2 channels of video input, 1 channel of video output Recording mode: motion detection, manually start or stop. Multiple languages support: 10 languages. Fast recording at 30 frames per sec total Time stamp in pictures. Resolution: 640x480. MPEG-4 video format. NTSC video mode Records overwrite: automatically recycle the storage space, by deleted the oldest data. Record and snapshot optional. Supports SD memory card (up to 16 GB), also support SDHC memory card (memory card not included)