USB-4100is a kind of DVR product which special for USB connector. As big as Credit card, it is easy to carry. High good Picture quality and Data transport fluency, the reason as follows: 1. The main chip adopt popular USB chip of CYPRESS; 2. The video capture part adopt latest 10bit high resolution ADC of CONNEXANT; 3. Adopt USB2.0 Connector; 4. Adopt latest Compression form H. 264. The software support unique electronic enlargement function and hard disk pre-occupation system, make the user conveniently. This product is suit for low channels surveillance system and laptop. Feature 1 channel realtime or 4 channel unreal time USB DVR Box Display and review at D1resolution, no color distortion, no delay High compression recording form, make the recoding time long Support compress current\preview current\fold year\month\day\hour\min\sec, text. And fold the pictures, mosaic also; Support first in first out auto file delete system(FIFO), no need to settle operation system fragment Support motive detection, video lose and link to sensor; Support client sever/IE remote motive\playback\control and central management; Support most protocols of alarm card and alarm box; Provide second develop kit(SDK) Software LOGO and interface can be user-defined.