Already have your own switch with a 2.5mm jack? Changing camera to one with a different connector? You need a conversion adaptor.
Comes with a female 2.5mm socket and a male connector of your choice for your new camera. Approx. 20-25cm cable between the socket and connector as standard, but you can choose a custom length for an additional cost.
Please note that unless requested otherwise, the Sony multi-terminal version of this adaptor comes with the focus and shutter control being crossed, i.e. it is unable to produce "half-press = focus; full press = shutter" functionality. Both signals will be sent at the same time, and the camera will process one then the other automatically.