Found the FCC report for the DC-16. Here's the key info from the cover letter: "ONTJETIDC16US consists of two transceiver boards which are configured to hop continuously and sequentially among 15 non-overlapping channels in the frequency range 2405 MHz to 2475 MHz using a Jeti proprietary application based on the 802.15.4 platform."

That translates to the system being a hybrid, similar to Futaba, which is a Frequency Hopping Direct Sequence Spread Spectrum system. It is specifically adapted from the industry standard Zigbee protocol.

BTW: That's a good thing!