The Sony Ericsson HCB-105 is a basic Bluetooth speakerphone designed for handsfree calling in an automobile. It utilizes a minimalist design with just two buttons. One adjusts volume, while the other is a multifunction key that can be used to accept or reject a call, power the unit on/off, initiate voice dialing, redial the last number, mute the microphone, or transfer the sound from your phone to the speakerphone.
