> For the complete documentation index, see [llms.txt](https://linkpi.gitbook.io/ndi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://linkpi.gitbook.io/ndi/product-introduction.md).

# Product introduction

#### About NDI

NDI® (Network Device Interface) was developed by NewTek Corporation, an open protocol and standard for connecting video devices over a network.

NDI® is mainly divided into two types, High Bandwidth NDI® (High Bandwidth NDI®) and NDI®丨HX. All of them can transmit high-quality video over IP. High-bandwidth NDI® features high-quality video

<figure><img src="/files/ZxJ8EE3KswFBxC4vZecw" alt=""><figcaption></figcaption></figure>

#### Parameters

<table><thead><tr><th width="203" align="right">Interface</th><th> </th><th data-hidden></th></tr></thead><tbody><tr><td align="right">HDMI IN</td><td>HDMI 1.4 Up to 4K30，with audio</td><td></td></tr><tr><td align="right">SDI IN</td><td>3G-SDI Up to 1080P60，with audio</td><td></td></tr><tr><td align="right">SDI Loop</td><td>Loop，same as SDI IN</td><td></td></tr><tr><td align="right">Line-IN</td><td>3.5mm, 48K stereo</td><td></td></tr><tr><td align="right">USB</td><td>USB2.0, expandable headset, serial port, etc.</td><td></td></tr><tr><td align="right">ETH</td><td>10/100/1000M Lan，Support POE</td><td></td></tr></tbody></table>

<table><thead><tr><th width="205" align="right">Software</th><th> </th></tr></thead><tbody><tr><td align="right">NDI Version</td><td>NDI 5, backward compatible</td></tr><tr><td align="right">NDI Mode</td><td>NDI(High Bandwidth NDI)</td></tr><tr><td align="right">Encode framerate</td><td>25~60</td></tr><tr><td align="right">Encode quality</td><td>Auto, Manual</td></tr><tr><td align="right">Audio gain</td><td>-12DB~+12DB</td></tr><tr><td align="right">PTZ</td><td>Support</td></tr><tr><td align="right">Protocol</td><td>Discovery、RUDP、TCP、unicast、multicast</td></tr><tr><td align="right">OLED</td><td>working status(NDI name、IP、Signal)</td></tr><tr><td align="right">Tally light</td><td>Two-size LED</td></tr><tr><td align="right">Intercom</td><td>Can make full duplex calls with LinkPi's full range of encoder products</td></tr></tbody></table>

<table data-header-hidden><thead><tr><th width="207" align="right">Other</th><th> </th></tr></thead><tbody><tr><td align="right">Adapter</td><td>DC 12V 1A</td></tr><tr><td align="right">Power</td><td>&#x3C;5W</td></tr><tr><td align="right"><p>Operating</p><p>temperature</p></td><td>-20℃~50℃</td></tr><tr><td align="right">Size</td><td>100x94x24mm</td></tr></tbody></table>