i have a caliber k40 and love it.. it has helped me avoid the police..or trick them i went by an instant on laser going 90 and i got lasered..nothing happened..the cop just sat there..it has happened a few times.. i definitely don't believe those you tube video's..they are total bs. mine works great and the laser diffuser does work..it has saved me a bunch. i haven't had a ticket in a long time and only 2 total. almost every car i have driven has had a k40 in it.. i love how stealth it is.. in my bmw 335 i just had them put 2 small form fit holes on either side of my cd player for the lights..that's it..the control is a blue tooth key pad.. i would try the bel sonics i think it is.. they have a similar unit that'ssuppossed to be the same but a lil cheaper
