The Sony mirrorless camera integrates the external power interface and the shutter control interface into a multi-function interface, which makes it impossible to use an external power supply when using a traditional shutter release, or when using an external power supply. The shutter adapter cable can solve the problem of not being used at the same time Problems with external power supply and shutter release.It can be compatible with the use of Qizi shutter and Qizi slide rail, if you connect to other brand products, please confirm that it is available.