The KW41 is supported by two reference designs. The Freedom Development Kit comes with two boards with antennas to ensure wireless connectivity out of the box. The FRDM-KW41Z’s highly-sensitive, optimized 2.4GHz radio features a PCB F-antenna which can be bypassed to test via SMA connection, multiple power supply options, push/capacitive touch buttons, switches, LEDs and integrated sensors. Also, the FRDM-KW41Z is form-factor compatible with the Arduino™ R3 pin layout for more expansion options. The other reference design is the USB-KW41Z. When used as a wireless packet sniffer, this USB dongle can monitor over-the-air communications. Alternatively the USB dongle can be used as a wireless network node with a simple connection to a PC or other USB enabled device.