The 32u4 900MHz RFM69HCW Packet Radio supports wireless networks that extend past 2.4GHz 802.15.4. The packet radio is more flexible than Bluetooth LE without the high-power requirements of WiFi.
The design is based on the ATmega32u4 processor, which is clocked at 8MHz and at 3.3V logic. The packet radio's chip offers 32K of flash and 2K of RAM. The built-in USB provides a USB-to-Serial program and debug capability. To support portable projects, the development board includes a connector for Adafruit 3.7V lithium polymer batteries and built-in battery charging.