Using Bluetooth® technology, your iMac can wirelessly connect (that is, pair) with devices such as the included Magic Mouse 2 and Magic Keyboard, and with optional devices like the Magic Trackpad 2, the Magic Keyboard with Numeric Keypad, peripheral devices, wearable sport accessories, and others.
Some included accessories may already be paired with your iMac. For more information about accessories, see the next section, Using a Bluetooth mouse, keyboard, or trackpad with your Mac.