Using Bluetooth® technology, your Mac Pro can wirelessly connect (that is, pair) with devices such as the included Magic Keyboard with Numeric Keypad, and with devices like the Magic Mouse and Magic Trackpad, AirPods, peripheral devices, wearable sports accessories, and others. To connect your Mac Pro with a device that’s not already paired, in System Preferences, click Bluetooth.
Note: Your Magic Keyboard with Numeric Keypad and the optional Magic Trackpad behave like a wired keyboard and pointing device when connected using the included USB-C to Lightning Cable. Bluetooth isn’t used, and all communication is over the cable.
See What’s included.