This is a FTDI USB Firmware Updater for the Dragon Link V2 Transmitter and receivers. This is a high quality FTDI USB Firmware updater for all Version 2 Dragon Link Transmitter and Receivers. This will also update the Dragon OSD, and many other devices that require an FTDI USB converter. This is plug and play and has connectors preinstalled to instantly connect to your Dragon Link Transmitter and Receiver. For help and instructions on how to update your Dragon Link system go tohttp://dragonlinkrc.com/v2/download https://www.youtube.com/watch?v=45bD7qvpmL4Dragon Link