5.0 is now released..look like the best one yet Sena Technologies, Inc. released the firmware version 5.0 of the SMH10 with major enhancements in functions and features such as Universal Intercom and Advanced Noise Control™. - Universal Intercom: You can have an intercom conversation with non-Sena Bluetooth headsets using the Universal Intercom™ function. - Advanced Noise Control™: It is equipped with wind noise suppression and intelligent Noise Gate in the intercom to limit the interference of wind noise and background noise while riding. - Sidetone: If this feature is enabled, you can hear what you are speaking during an intercom conversation or a phone call. You can upgrade your firmware using the new Device Manager v1.4.4 for Windows and v1.9.4 for Mac users. http://senabluetooth.com/sena-released-smh10-firmware-version-5-0/