It's best to directly contact the seller when purchasing the machine, as software obtained from Taoyu may not be compatible.
If you don't know who is selling it, or if the seller is a second-hand dealer and doesn't have software, call Hytera customer service at 4008307020 during business hours to help you find the correct distributor. You will need to provide the device serial number when calling.
I found the software for recording videos from a machine that I won in a contest, and it was free.