Radar compatibility depends on the device used as the glasses' primary connection.
If your primary connection is an iOS phone, Android phone or Apple Watch, the glasses currently support Garmin and MagicShine radar tail lights only.
If your primary connection is a Garmin watch, Garmin bike computer or Hammerhead Karoo 2 or Karoo 3, the radar tail light brand is not restricted. In this setup, radar information is sent to the glasses through the supported Garmin or Hammerhead device.
Before choosing a radar tail light, confirm which device you plan to use as the primary connection.