Portland Tool & Die, Inc. BTC-4149-R5 - 12/21/2019 This release includes the following elements: BTC-4149 instrument firmware version v4.5 - Add support for controlling the HFP mic gain parameter. - Add the ManInTheMiddle parameter into the main system settings group, so the value can be saved across power cycles. PtdCsrFw version 11.5 - Add support for controlling the HFP mic gain parameter. BTC-4149 command line interface(btc4149.exe) version 1.3 - Add support for controlling the HFP mic gain parameter. BTC-4149 windows installer v5 USB virtual communications port driver, version 1.0