What is a Cordless Speakerphone?

Wired telephone is a communication device that uses a microphone to replace the sound with a corresponding electric signal, transmits the electric signal to a place far away from the speaker with a conductive wire, and then restores the electric signal to the original voice through the receiver. It has the advantages of good call performance, easy use, and low cost. The producing countries are mainly in Asia. Such as China, Taiwan, Malaysia.