The 3DR Radio telemetry system is designed as an open source Xbee replacement radio set, offering a lower price, longer range and superior performance to Xbee radios. It’s available in 915Mhz and 433Mhz; and in the following configurations:  serial board (for the air) and USB (for the ground).

product includes :

2 x telemetry modules

2 x connecting wires

2 x Antenna set

2 x Usb type C cables