When the Sony WH-CH510 headphones came, they appeared to be made of plastic, but this isn't a problem because it helps keep the device light and practically unnoticeable when worn. They were really easy to pair with my phone after charging, and when I switched it on, a female voice informed me that they were on, bluetooth linked, and fully charged, which is a pleasant function. The bass is outstanding for headphones at this price point in terms of music quality, but it doesn't sacrifice the clarity, which is also of high quality. The controls are simple to use and function as expected. When you're listening to music and want to switch to a different sound file, the headphones seamlessly switch to the new source and then return to what you were listening to before, which is even better. the simplicity of use In a nutshell, because of its functionality and lightweight design.