I believe I have 3.825 as I just received the unit today and the lady on the phone said it would be 3.825. I'll double check with the programming mode next time I go for a ride.
In "L" mode (I didn't test 'l' mode) K is filtered along with X until the signal gets too strong for the V1 to think it's fake.
I noticed this today. Same behavior for X band.
I also got a J today, too. Started off as Ka and literally one second later I got a J on the screen. Must've been real junk as there were no cops around, only regular traffic.