 In 2008, Microchip released a 2.4 GHz wireless transceiver module with a standard 4-wire SPI interface paired with several Microchip PIC and dsPIC microcontrollers (the Microchip MRF24J40MA, MRF24J40MD, MRF24J40ME), and can be used in production devices.Being ZigBee compliant, and capable of communicating using MiWi wireless protocols, it is based on the IEEE 802.15.4 Wireless PAN standard.Option are for PCB antenna or u.FL connected antenna.