Sennheiser IE PRO BT Connector Bluetooth Module For IE 100 PRO/IE 400 PRO/IE ...
Sennheiser IE PRO BT Connector Bluetooth Module For IE 100 PRO/IE 400 PRO/IE 500 PRO In-Ear Monitors. Simply swap the cable and enjoy perfect sound everywhere. That's it. Phone calls are also possible through a built-in microphone.