The MikroElektronika's SPIRIT 2 Click, It is 868 and 915 MHz, low power RF module with integrated microcontroller. The module is a compact-size module, integrating an on-board antenna and wireless connectivity. It has standard firmware, AT command for RF configuration and simple point-to point communication.

Compact size:- 14 mm x 13.4 mm x 2.5 mm
Operates from a single 1.8 V to 3.6 V supply
Output power up to +11.6 dBm
Data rates up to 500 kbps
Modulation schemes: 2-FSK, GFSK, GMSK, OOK, and ASK