If I understandthis correctly is does say the rx will work with dsm1 and 2 rx's.
Combining Spektrum’s industry-leading 2.4GHz DSM® technology with valuable telemetry features, the DX3S represents the most advanced sport-level DSM radio ever developed. RTR drivers and sport racers can add the safety of telemetry and monitor vital vehicle stats right from their transmitter, without any additional equipment. Keep your engine operating in the optimum temperature range, keep an eye on your battery voltage and check out just how fast your vehicle is running, all right from the large LCD readout of the DX3S. The DX3S is now compatible with the MR3000 and DSM2 surface receivers too.