Following the purchase of a camera of this brand (SD 19) I wanted to test the harness chest fixation. So already, compatible with my cam and also the tunable reference SD 21 / SD 23/50 or any other HD cams with universal screw 1/4 (this is indicated on the package) Original product Pnj Cam AEE not a counterfeit or imitation, see my pictures 1 and 2. Supplied with a support with 3 screws for lateral adjustment, horizontal and vertical short for what is right (photo 4 and 5) I did not test live but soon winter sports, just tried (photo 3) I would comment on that later. I come back on after 5 uses. So I used to ski and ski bike ... So-so it sways too I do not advice, it is best to use his cam on the helmet or on a pole has less to do schuss By bike ... not bad! but the weight of the cam on the attachment tends to drive down and see that we are already a little bent so we filmed the bitumen over the board so I fix a bike or helmet ... If not for activities such as hiking water that should do it ...