I just bought a K2/100 (I now own 4 and a K3, KPA 500 and scope) and it came with DSP. I checked it out and it works FB but don't use DSP so the module is an extra now. Anyone wishing to own a DSP module for their K2 can buy mine for $165 which includes shipping within the USA. Please contact me at the above email address or via QRZ.com. 73, Ted K8AQM