1, whether the usb interface of the stereo is used for audio power supply or reading an external USB flash drive to play music depends on the model and functional specifications of the stereo.
2. A 3.5 mm plug refers to a coaxial audio plug with a diameter of 3.5 mm. It is a connector commonly used to connect audio equipment to transmit audio signals. Headphones are divided into three layers of stereo.
The 3.5mm interface of the stereo needs to be plugged with an audio cable, and the audio cable is plugged with an audio input to play the sound of the input source. Compared with the sound played by mobile phones, computers and televisions. Most stereos play music mainly through the audio input of 3.5mm interface.
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USB devices mainly have the following advantages:?
1. Hot plug. That is, when users use external devices, they don't need to turn off and turn on, but plug in USB directly when the computer is working. ?
2. Easy to carry. Most USB devices are small and light, which is very convenient for users to carry a lot of data with them. Of course, USB hard disk is the first choice.
3. Uniform standards. Everyone is familiar with hard disk with IDE interface, mouse and keyboard with serial port, printer and scanner with parallel port. But with USB, these application peripherals can be connected to the same standard personal computer, and then there are USB hard disk, USB mouse, USB printer and so on.
4. Multiple devices can be connected. USB often has multiple interfaces on personal computers, which can connect several devices at the same time. If a USB hub with four ports is connected, you can connect it again. Four USB devices, and so on, as far as possible, all the devices in your home can be connected to a personal computer at the same time, without any problems (note: 127 devices at most).
Baidu encyclopedia -USB interface