[jareknyc]

If you do please provide us with your opinion if its really working or its not like in the movie on you tube, the only video they have there...and its not working

 

[jenk12m]

mine actually works, i just havent had hardly any instances where a cop has tried to get me. i've only gotten tagged 1 time in last 2yrs since i bought my car and put the k40 on, and it worked on that 1 instance

 

[NigelM5]

I ve got the K40 calibre in my Z06. Works OK. Not great. Very stealth which is good in some states. Nice quality. Just doesnt pick up as early as Valentine or Passport SRX.