You must pair your device with another device before you connect to it.
From the Home screen, tap Apps > Settings
> Bluetooth.
Tap to turn Bluetooth on. You will see the option to make your
tablet visible. Then tap Search for devices to view the devices in range.
Choose the device you want to pair with from the list.
Once the paring is successful, your device will connect to the device.
Your tablet doesn't support Handsfree Profile. Therefore, the use of call features with some of accessories, such as Bluetooth headsets or Bluetooth-enabled devices, may not be available for this device.