The DL435-30 transceiver is based around the Qualcomm Atheros AR5414A baseband processer and a RF Micro Devices RF2051 VCO and mixer.  The DL435-30 transceiver itself "looks" like a standard 2.4 GHz 802.11g device in software, but the hardware is configured to provide a frequency offset of 2019.5 MHz.  For example, if you select "2.442 MHz" in your configuration software the actual operating frequency will be at 422.5 MHz.

Over the years, the Prism-WiFi technology has matured and can provide high performance and cost-effective SDR solution. Doodle Labs engineers have a systematic way to optimize performance at target frequencies. Doodle Labs can achieve COFDM/MIMO operation in as small as 3 MHz channels. Small channel sizes allow broadband connectivity in unique channel plans and private spectrum.