I bought the remote shutter button down by STRATA24 (the FBA) and was surprised that the product works very badly - maximum distance was about 1 meter. Then I have a bought by Amazon (the 16 will cost 13.49 instead by STRATA24). And, what a surprise, this remote trigger worked better - from a distance of about 4 meters !!!
A closer look at it is even to see that these two products that should look quite identical, look different! Look at the picture in the customer picture gallery. The product of STRATA24 looks like fake .... So watch out! There are fakes on the market!