*Note: SMART HJC BT App works only with SMART HJC 50B, 21B, 20B ---------------------------------------------------- SMART HJC BT APP SMART HJC BT App allows you to manage intercom groups, configure device settings, save up to 3 Speed Dial presets, save up to 10 FM radio station presets, and view the Quick Start Guide and the User's Guide. By simply pairing your phone with your headset, you can use SMART HJC BT App for quicker and easier set up and management. Key Features: * Remote Control