cctv DVR card H.264 video codec, 4ch video, 1ch audio, 9 ADCs super high quality, H.264 optimized, TCP/UDP ... software Features :Key SpecificationCamera input: 4 channelsAudio input: 1 channel audio input through sound card with microphoneImage quality: 9-bits ADCs ... do not support)Windows Directx9.0 is requiredLatest Display adapter driver 4ch H.264 optimized cctv PCI type video&audio DVR card