This product is either discontinued or we cannot get that from suppliers.
Poly 89259-02 Plantronics Bluetooth Adapter, Usb Dongle, Bluetooth 2.0, ISM 2.40 GHz, Antenna Range 10.1m, Wireless speed 3 Mbit/s, External, Compatibility Calisto 620 UC Speakerphone.
Get the Plantronics BT300 USB Bluetooth Adapter for a seamless work experience in office or while traveling. This USB Bluetooth adapter features a premium quality make and offers best-in-class technology so you can work on the go.