Bee click (MIKROE-987)

BEE Click is an accessory board in mikroBus™ form factor. It features 2.4 GHz IEEE 802.15.4 radio transceiver module MRF24J40MA. This module includes an integrated PCB antenna and matching circuitry and is connected to the microcontroller via a SPI interface. As such, this module is an ideal solution for wireless networks, smart home automation, building automation and other electronic applications that need wireless communication. Board is designed to use 3.3V power supply only.

http://www.mikroe.com/click/bee/