The CC1101 is a 868 MHz transciever module. The CC1101 module has a maximum range of 300 meters in the open field and a sensitivity of approx. -112 dBm. For communication, an SPI interface is available.
Specificaties:
IC: CC1101
Operating voltage: 1,8V - 3,6V
Current consumption: max. 25mA (load), 200nA (sleep)
Logic level: 3.3V
Interface: SPI
Radio frequency: 868MHz
Range: 300m free field
Sensitivity: about -112 dBm
Size: 1,9 x 1,7cm
Arduino library:
https://github.com/veonik/arduino-cc1101