Parts of a phone
13. headset
a set of headphones, often with a microphone attached
（尤指带麦克风的）耳机
14. wireless headset
/ˈwaɪərləs/
wireless
relating to a system of communications that does not use electrical or telephone wires
15. calling card = phonecard
17. answering machine = answerphone
a machine that records your telephone calls when you cannot answer them
18. voice message
19. text message = text
a written message that is sent or received on a mobile phone
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