How to Use XBee Modules As Transmitter & Receiver - Arduino Tutorial : 5 Steps - Instructables
Xbee Radio Telemetry Module Cuav 28mile Long Range Telemetry For Open Source Autopilot Pixhawk / Apm / Paparazziuav / Betaflight - Circuits - AliExpress
XBee XB3-24Z8PT Series 3 PRO Module, PCB Antenna (Long Range) - Parallax