Portland Tool & Die, Inc. BTC-4149-R4 - 8/17/2019 This release includes the following elements: BTC-4149 instrument firmware version v4.4 - Add support for the hfp-sco-role feature. PtdCsrFw version 11.4 - Disable use of 3 Mbps ACL packets to avoid audio dropouts with newer SINK type devices. BTC-4149 command line interface(btc4149.exe) version 1.2 - Add support for the hfp-sco-role feature. BTC-4149 windows installer v4 USB virtual communications port driver, version 1.0