Happymodel EP82 VRX-Backpack Module

So what is this VRX backpack? This Happymodel “backpack”is designed to allow wireless communication between ExpressLRS, and other FPV-related devices for command and control, or for querying config. Currently there aren’t many VRX modules that can allow them to communicate with ELRS. This small ESP-based receiver can be “piggybacked” onto your VRX module, which allows ExpressLRS to control the band and channel that your goggles are set to. We call this device the “VRX-Backpack”.