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3.5mm to AV (composite video + audio) cable （3.5mm 转 AV（复合视频 + 音频）线缆 ）
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Description
This is a 3.5mm to AV (composite video + audio) cable, a type of audio-visual transmission cable.
Connector Types:
One end is a 3.5mm stereo plug (compatible with the headphone/audio jacks of mobile phones, computers, and other devices);
The other end has three RCA plugs, where the yellow plug transmits video signals, and the red and white plugs transmit right-channel and left-channel audio signals respectively (commonly used in the audio-visual input interfaces of old-fashioned TVs, projectors, DVD players, etc.).
Function and Application: It enables the synchronous transmission of audio and video signals between a "3.5mm interface device" and an "AV interface device". For example, it can output audio and video content from a mobile phone to an old-fashioned TV for playback.
Material and Design: The main body of the cable is black, and the plugs are gold-plated (to reduce signal loss and improve transmission stability). It is suitable for scenarios that require simultaneous transmission of audio and video signals, such as the interconnection of old-fashioned audio-visual equipment and simple multimedia demonstrations.
这是一根3.5mm 转 AV（复合视频 + 音频）线缆，属于音视频传输线缆。
接口类型：
一端是3.5mm 立体声插头（适配手机、电脑等设备的耳机 / 音频接口）；
另一端是三个 RCA 插头，其中黄色插头传输视频信号，红色和白色插头分别传输右声道和左声道的音频信号（常用于老式电视机、投影仪、DVD 播放器等设备的音视频输入接口）。
功能用途：实现 “3.5mm 接口设备” 与 “AV 接口设备” 之间的音视频信号同步传输，例如将手机的音视频内容输出到老式电视机上播放。
材质设计：线缆主体为黑色，插头采用镀金工艺（减少信号损耗、提升传输稳定性），适用于需要同时传输音频和视频信号的场景，如老式影音设备互联、简易多媒体演示等。
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