Generally speaking, if you have a USB music interface, it will support reading the music directly from the USB device, so you only need to install the mp3 music file with a U disk, plug it into this interface, and then you can Used. You can play the music in this USB flash drive.

Turning on the hot air consumes fuel, but not as much as turning on the air conditioner in the summer. Air conditioning refrigeration requires the use of a compressor, and the operation of the compressor consumes more fuel. The principle of turning on the heater in winter is different. It uses the engine's coolant temperature for heating, that is, the heat released by the engine itself is blown into the cabin through the blower.

USB devices mainly have the following advantages:

1. It can be hot-swapped. This means that when using an external device, the user does not need to turn off and on again, but can directly plug in the USB when the computer is working.

2. Easy to carry. Most USB devices are known for being "small, light, and thin", which is very convenient for users to carry large amounts of data with them. Of course, USB hard drive is the first choice.

3. Unified standards. Common ones are hard drives with IDE interfaces, serial mouse and keyboards, and parallel port printers and scanners. But with USB, these application peripherals can all be connected to personal computers using the same standards. Then there are USB hard drives, USB Mouse, USB printer, etc.

4. Can connect multiple devices. USB often has multiple interfaces on personal computers, which can connect several devices at the same time. If you connect a USB HUB with four ports, you can connect it again; four USB devices, and so on, you can connect as many times as you want. , connect all your home devices to a personal computer at the same time without any problems (note: can connect to up to 127 devices). ?

Reference for the above content: Baidu Encyclopedia-USB Interface