Ports for micro-USB and a 3.5mm headphone jack sit up top, with the volume rocker and lock key on the right and a covered slot for microSD or, in the case of the (gold) 308, a second full-sized SIM on the opposite edge.
To authenticate a key, it is placed in the USB slot at the front of the device and the "Copy" button is held in until the MyDitto emits a beep to start the process.