ZOON is 2.4Ghz LoRa based long range telemetry module. ZOONv3 can send data up to 21km at 0.5kbps and 6km at 125kbps.
ZOON adds mavlink rssi packets to mavlink enabled data beside LED signal indicators.
Furthermore, "Mavlink NEVER LOST" also dynamically changes data speed and sends only necessary packets such as position,orientation,rtcm(rtk gps),etc. when the drone/robot is far away.
As ZOON uses LoRa chirp spread spectrum, It has strong immunity to reflection from obstacles and other wireless signals around.
Connection to ZOON can be with microUSB, JST - SM04B-GHS-TB, or ST - SM06B-GHS-TB.
It is also full-duplex. (Note also that it has half-duplex physical connection as similar to WiFi).
Learn more dronee.aero/zoon