I use the Sony Sony RMT-P1BT Bluetooth remote with my A7R-V. It works flawlessly, but I see it has been replaced with the RMT-VP2 that has added functionality for lens control (which I don't need). I also have the Sony RM-SPR1, which is wired and connects to the USB-C port. It too works perfectly, but the Bluetooth version is a LOT more convenient, especially when L-plates make access to the ports difficult.