Oops... Sorry ersin,
Someone mentioned you worked for Escort...... me bad.
I thought I mentioned that "for me" the K40 was by far the best since it is totally built in and on all the time. Plus has dedicated front and rear detection.
Works for me. No tickets in 5 years of owning it! Had it in my Infiniti M45 prior.....
2009 Space Gray Carbon Leather E90 with DCT, Loaded except for that stupid cruise control and moonroof. Mods: AA pulley and air filter. Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, Powerchip tune, Eisenmann Sport Mufflers, Xenon interior lights, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W