It's quite easy to connect your iPhone to a Bluetooth speaker. Your iPhone is enabled with the ability to pair with speakers via Bluetooth, which comes in useful anytime you need to stream music or something else via a speaker. Since AirPlay is a proprietary technology, AirPlay devices may be harder to find than devices that support Bluetooth technology. Bluetooth speakers function in a similar way as AirPlay units, though Bluetooth is not dependent on Wi-Fi like AirPlay.