It connects through Bluetooth Low Energy (BLE). No wires or anything of that nature connect to your phone. The button is usable within normal phone Bluetooth range, which is typically 100-300 feet away from the phone.
While many PTT Button users mount the button on their phone itself to make the phone behave like a walkie-talkie, it’s also possible to mount the button on a lanyard, desk, or any other location that is convenient for you.