After I lost the very little waterproof remote control of Pentax and the price for acquiring this rose to some 40 (then 25-29) I opted for a 'no-name' products.
I was indeed aware that these or similar for 3 or 4 can be obtained etc. as DealExtreme among Asian merchants, shipping times there but often very long waiting times call (4-8Wochen), which I had not, and resorted to a product importer or dealer pulse photos back.
Function includes auto focus, and trigger lock for long exposures.
Round satisfactory.