Poly Sync 20+ Bluetooth Speaker Phone

I believe it is because of the original uses of "speakers" were for early telephones by A.G. Bell & Reis. They were called "loud-speaking telephones" which used a very simple iron-coil/membrane speaker.Speakerphone is a function that is used by several people to hear and be heard in calls between two phones. The phone will switch to speaker, and change the settings for phonogram from picking up sounds close to the phone to a bigger area. Speakerphone is easy to use and a popular function that most phones have.The loudspeaker is a small sound driver fitted within a mobile phone, or other communication device, which is used to produce sound. Traditionally, loudspeakers on mobile phones are used to produce sound alerts for events such as incoming calls, incoming messages and alarms.