You can also check the sites - http://www.radarspotting.com en http://www.radarspotters.eu Here is a sample of the 820 T-dongle, They are about 8 dollar ,you can use the standard antenna when you cut it at 65 MM ,but for a better antenna you need a MSX- SMA- Adapter http://www.ebay.com/sch/i.html?_t...