It's possible to use a Bluetooth device with the Lumin screen, eg. Bluetooth speaker, earphones or keyboard, if needed. Below are the steps:
While the Lumin screen is powered on, press the power button at the back until 3 buttons appear on the screen (Power Off, Reboot and Settings)
Tap on Settings
On the right, tap on the grey "System Settings" button
You will be asked for the PIN. Enter "8888"
On the Connections row, tap on the round Bluetooth button.
On the right side of the screen, there is a switch to turn on Bluetooth. Tap on it to make it blue-green. (It's coloured grey if it's off)
All available devices will be shown. Tap on the name of the Bluetooth device you wish to pair. (Make sure the Bluetooth device is On)
You should hear a prompt from your Bluetooth device and see the word "Connected" under the name of the device if the pairing is a success.
To go back to the home screen, tap on the Home button at the upper left corner of the screen.