Smart wearable devices are not very strange to us, such as sports bands, smart watches, smart clothes, virtual head-worn displays and so on, which provide people with a variety of experiences.
The earphone tube is designed to be rotated and detachable. It is made of standard stainless steel. Every time you screw on the tube, it is full of ceremony!
Mobile phone Cato is a very common and simple parts of the mobile phone, which is used to fix the role of mobile phone card and memory card, if it is not the friend's experience