The wireless convenience of Bluetooth provides users with hands-free control over Sendo X without the need for cables or wires. Inconspicuous in either ear, allowing users convenient and discreet access to all basic call controls - whether Sendo X is in your hand or out of site. Key functions include: Answer/End button to allow users to take and make calls, redial, and switch the audio back and forth between headset and handset. A seperate volume control lets the user raise and lower the call volume. To maximise call security, the headset also supports encryption of the wireless connection.