UTStarcom Sidekick Slide Motorola Bluetooth Stereo Gateway DC800 98690

Music can now be streamed from your UTStarcom Sidekick Slide phone or stereo to your headset for wire-free listening enjoyment. With the ability to turn most stereos into a wireless music system, the portable Motorola DC800 streams content to the Motorola HT820 from the stereo and Bluetooth wireless-enabled mobile phones.
For group listening, music can be played through the stereo speakers.
Built-in Bluetooth Class 1 Gateway wireless technology with a range up to 300 feet (100 metres), covers almost any home or property.
Two-way stereo functionality allows users to receive content from other Bluetooth devices and play music from their home entertainment system or stream content to other devices.

Motorola Original Accessory.