before buying dashcam i did alot of reasearch and at that time ONLY viofo was offering TRUE 4k dashcams other companies were marketing 4k but actually was fake 4k,bit rate was either too low or resolution didnt match 4k... i got my self a129pro and its amazing ,thats why i believe this one is even better one.
VIOFO,blackvue,thinkware...those are the compaies that are on top so if buying choose wisely or at least go check dashcamtalk forum.