内置话筒、扬声器、天线都使体积难以缩小，而这些新型装置也需要体积较大的电池来支持其复杂的功能。
Contributing to their size are the installed microphone, speaker, and antenna. The devices also need a larger battery to power the complex functions of the phone.
我的无线话筒需要换个电池。
录音装置式玩具，涉及有玩具壳体、录音话筒、录音芯片、电池和开关组成。
A recording device type toy and composes a toy casing, a recording microphone, a recording chip, and a battery and a switch.
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