Using your Axis Flying Thor ELRS TX Module with Receiver is a breeze. First, make sure your radio has a compatible JR mount. Insert the module into the radio's bay using the quick - release mechanism. You can adjust the output power from 10 - 1000mW by using the 5 - way tactile switch on the high - brightness OLED screen. If you need higher transmission powers, connect an external battery up to 5S via the XT30 connector. This will also help save your transmitter's battery life. When it comes to maintenance, keep the module clean and avoid exposing it to extreme temperatures. The CNC aluminium case and built - in fan help with heat dissipation, but don't block the ventilation. And always remember to disconnect the external battery when not in use. Happy flying!