The Long Range Receivers pair with the PixLite 16 Long Range MKII controller.  Each receiver allows access to 2 output channels from the controller board (or 4 outputs if you’re using non-clocked, data-only pixels).  Because they are isolated, they protect your circuit from grounding and power problems which are common in large installations.

2-Channels LED control data is sent from the PixLite 16 LR board to the receivers over twisted-pair category cable (either Cat5 or Cat6).  At the Isolated Receiver boards, the data is converted back into useable SPI-level pixel data.  More technical details about these receiver boards can be found on the Advatek website.