Hosa Technology has developed a Bluetooth audio receiver.
The Drive Bluetooth Audio Receiver is designed to receive Bluetooth transmitted audio, e.g. from a smartphone, and via its 3.5 mm outputs provide a stream of audio to nonwireless audio equipment.
The advantage of the rechargeable battery-powered device is that it can be hooked up once (to an aux input) and left, whereas obtaining audio from a smartphone (or similar device) would require connecting it with a cable each time it is used. This would be a handy device for a production bay or an ENG journalist desk.
Drive Bluetooth Audio Receiver provides 3.5 mm outputs, has an app. 10-hour battery life, and comes with a 3.5 mm TRS cable and USB charging cable. It is compatible with Bluetooth 3.0.