This application allows user to make a half-duplex calls via Bluetooth - Application should be run on at least 2 devices (see list of supported devices in above section) - Bluetooth should be 'On' on the device (usually from "Main menu"-"Connectivity"-"Bluetooth") - To activate the service, run application and make sure that it displays "Active" - To display list of available devices - use "Options"-"Refresh" menu item - To check if remote device supports BT walkie-talkie service - select CSK-"Discover services" - If remote revice supports BT walkie-talkie service, you'll be able to make an outgoing calls by pressing "Green" key, CSK, or "Option"-"Call" menu - Once the call is established, you'll be able to send voice message by pressing and holding the "Green" key.