When purchasing an obstacle database or a feature license, you need the internal serial number of the FLARM module. This can normally be found on a sticker attached on the device, or in product documentation.
When you select your device in the webshop, a help text shows you the format of the serial number for your device.
For legacy Classic FLARM-based devices from other manufacturers, the serial number is usually a three to five digit number.
In integrated devices (e.g. LX8000), the internal FLARM serial number is shown on a page in the menu. Make sure to use the internal FLARM serial number and not the serial number of the device itself. Also do not use the radio id (six alphanumeric characters).
If you cannot find the internal FLARM serial number, please contact the manufacturer of the device.