HELIX Extension Card to extend the features of your device with Bluetooth® audio streaming and an additional digital optical output. The module "HEC BT", including the specific side panel, is available for the following devices: HELIX DSP PRO © 2013 CSR plc and its group companies. The aptX® mark and the aptX logo are trade marks of CSR plc or one of its group companies and may be registered in one or more jurisdictions. The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Audiotec Fischer GmbH is under license. Other trademarks and trade names are those of their respective owners.