Today we will highly recommend you this USB DVR!The latest USB DVR can record the information for a whole day! It also supports the playback function! However, the 4 channel USB DVR offers you the real-time or time sharing monitor. They also support the synchronization of video and audio compression and transmission. Our USB DVR is your ideal choice! Just occupy a small capacity can provide you high definition images. It can be used as the remote monitor tools! Through a digital TV set-top box, the signals can be transfer to the computer then you can see a clear and bright image. You can change the size of the image window or to see the television programs by full screen. It is widely used in different fields. It can be used in the field of Security monitoring, video telephone, video conference, card production, computer camera, fingerprint analysis, video mail, bank seal recognition, medical analysis and so on! Take the Video Surveillance System home now!