... . It's very convenient. TY309 is a low cost, high performance, 8 video input, USB2.0 interface, PC-Based DVR. It ... 's a simple way to create a versatile high specification CCTV ... : ParameterDescriptionVideo Input8CH, BNC interfaceAudio Input4CH, RCA interfaceHost interfaceUSB2.0 High Speed(480Mbps)Display (PAL)200fps(25fps/channel)Display (NTSC)240fps ...