Pair Magic Keyboard with iPod touch
You can use Magic Keyboard, including Magic Keyboard with Numeric Keypad, to enter text on iPod touch. Magic Keyboard connects to iPod touch using Bluetooth.
Pair Magic Keyboard
Make sure the keyboard is turned on and charged.
On iPod touch, go to Settings
> Bluetooth, then turn on Bluetooth.Select the device when it appears in the Other Devices list.
Note: If Magic Keyboard is already paired with another device, you must unpair them before you can connect Magic Keyboard to your iPod touch. For iPhone, iPad, or iPod touch, see Unpair a Bluetooth device. On Mac, choose Apple menu 
> System Preferences > Bluetooth, select the device, then Control-click its name.
Reconnect Magic Keyboard to iPod touch
Magic Keyboard disconnects when you turn its switch to Off or when you move it or iPod touch out of Bluetooth range—about 33 feet (10 meters).
To reconnect, turn the keyboard switch to On, or bring the keyboard and iPod touch back into range, then tap any key.