The Uniview 4 CHANNEL DVR XVR301-04G3 is a versatile digital video recorder that supports various video formats including H.265 and H.264. It allows audio transmission over coaxial cable and is compatible with multiple camera types such as TVI, AHD, CVI, CVBS, and IP cameras, providing adaptive access. The device features a 4-channel BNC input and supports one channel HDMI and VGA outputs with resolutions up to 1920x1080. It is designed for long transmission distances over coaxial cable and supports mainstream cameras with ONVIF and RTSP protocols.

The model XVR301-04G3 has an analog video input of 4 channels via BNC and can accommodate 2 IP video inputs, with each channel supporting up to 4MP. It supports various analog camera types at different resolutions and frame rates, including AHD input at 5MP (20fps), 4MP (30fps), 1080P (30fps), and 720P (60fps). TVI, CVI, and CVBS inputs are also supported at similar specifications. Audio input is facilitated through a single channel RCA connector, and audio compression is handled by G.711U.

For video and audio output, the XVR301-04G3 provides VGA output at multiple resolutions including 1920x1080p at both 60Hz and 50Hz, and HDMI output at the same resolutions. Audio output is also through a single channel RCA connector. The device supports synchronous playback for HD at 2 channels and SD at 4 channels, and live view display configurations include HDMI/VGA at 1/4/6/8/9. Additionally, it features two-way audio through a single channel RCA connector.

The network capabilities of the XVR301-04G3 include an incoming bandwidth of 16Mbps, which can be increased up to 24Mbps after all analog channel conversion. This ensures efficient handling of video data across the network. The DVR is engineered to meet the needs of a variety of surveillance setups, providing high-quality video recording and playback capabilities. 

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