This unit features a Philips LPC2138 ARM7 microcontroller and Chipcon’s 2.4GHz CC2420 ZigBee transceiver to support IEEE 802.15.4 with 250 kbps data rates at ranges up to 550 feet. The Elan Digital Systems’ VPU16550 Compact Flash interface appears to Windows devices as a COM port – eliminating the need for complicated device drivers.