Connect a Bluetooth device.
Your iPhone can connect wirelessly to Bluetooth devices like keyboards, headsets, and car kits.\n
Go to Settings, and tap Bluetooth. Turn on Bluetooth.\n
iPhone will automatically start searching for Bluetooth devices. Tap the device in the Devices list, then follow the onscreen instructions to connect to it.\n
Note: You may need the documentation that came with your Bluetooth device for more info about pairing.