About this item ❤ The innovative design of independent volume knob is convenient and quick, which can get of the trouble of long press adjustment and make the volume adjustment more convenient. ❤ It supports four playing modes, namely, Bluetooth, wired, plug-in card and USB flash disk. It is better for outdoor wireless use. Bluetooth is continuously connected at 15m. ❤ The antimagnetic technology reaches the G point, and there is no current noise. To overcome the natural enemy of current noise, the antimagnetic chip and dual magnetic circuit design are used to offset the positive and negative electromagnetic fields, so as to achieve 360 掳 all-round antimagnetism and no longer worry about the interference caused by mobile phones and computers. ❤ Wired and wireless dual connection can choose any connection mode. Built in Bluetooth 5.0 chip, it can transmit data wirelessly for about 10 meters. It is stable and fast. All Bluetooth devices are universal. ❤ The imported digital effect is adopted, and the sound source reduction is more than 99%, which is close to the lossless sound effect: commonly known as the amplifier.