Do not use the device near your ear while you use the speakerphone. Hearing damage can occur.A speakerphone with a microphone and loudspeaker allows multiple user's to participate in a conversation. Speaker phone allows the phone to be used at a short distance, without the phone being held next to the face and without using a headset .The loudspeaker broadcasts the voice or voices of those on the other end , while the microphone captures all voices of those using the speakerphone. It is also useful for hands-free, safe operation in an automobile, and when on hold for a long period of time.