Jwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 20 Reply 1, posted (11 years 4 months 2 weeks 3 days 22 hours ago) and read 1946 times:
what can you do: guess
range: depends on the device and the transmitter range. Typically 30-50km
en-route traffic: depends on the scanner. Many do not have the required frequency bands.
If you want en-route traffic, you're gonna have to spend big bucks as only the more powerfull featurerich models can reach them and those are of course the more expensive ones...