EPOS SENNHEISER BTD 800 USB ML Bluetooth Dongle for Presence Grey UC/MB Pro 1/2 UC ML/MB 660 UC MS: Amazon.de: Computer & Accessories
Sennheiser BTD 800 USB - Network Adapter - USB 2.0 - 1000227
BTD 500 USB Dongle : Electronics
BTD 500 USB Dongle : Electronics
Poyatu Aptx Hd599 Bluetooth Adapter For Sennheiser Hd599 Hd579 Hd569 Wireless Adapter Receiver Bluetooth Cable Cord - Wireless Adapter - AliExpress
Sennheiser EPOS BTD 800 USB ML Bluetooth Dongle
Sennheiser Bluetooth 4.0 - Bluetooth Adapter for Headset - USB 2.0 - 2.40 GHz ISM - 82 ft Indoor Range - External UC BTD 800 USB UC CISCO AVAYA IBM - Walmart.com
Sennheiser BTD 500 USB - - USB Bluetooth Transmitter Never used New in box | eBay