Have the SJ 4000 Wifi for several weeks in the test, it is ultra compact in size and weight, the accessory is enough to start. First time for video quality, Hammer as crisp video makes the Cam (unfortunately only in 30 FPS specify 60 FPS are only doubled 30 FPSx2), whether outdoors or indoors (tested outside the net and Obi DIY store) in normal indoor lighting and daylight strikes the video quality even my Samsung S5! The coolest feature of course is the 170 ° View + Wifi + display. When it is dark and dim lighting course there noise but who Filmt already wenns Arschduster is ... The photo quality is not as the bearer there into 2MP to minimum 16: 9 images, but it is indeed intended for action and not for professional photos (hence only 4 stars )! Accessories and adapters for bike helmet etc aussreichend! The underwater test is started in the summer but I am very confident that you as so does ...
My conclusion for the price you get a piece ordendliches Actioncam are the extras (the brand when competitors all cost extra) going at the qualification in terms of processing and the functions to GP can wrap up warm ...;)