Designed to be comfortable enough for all-day listening without compromising on sound, the WH-CH520 Wireless Headphones will give you style, versatility and usability. Available in four different colours theyll suit your style perfectly, and offer you a clear and reliable sound, whether youre listening to music or making phone calls.Tailor sound to your personal preference by choosing from a variety of pre-sets to match sound quality with the genre of music you're listening to. Or create and save your own pre-sets using the EQ Custom feature on the Sony Headphones Connect app.With 360 Reality Audio certified headphones and the Sony Headphones Connect app, optimise your experience by analysing your individual ear shape, and enjoy the ultimate immersive music experience.With up to 50 hours of battery life, you can listen to your favourite music without worrying about running out of charge. And, if your headphones battery is running low, a 3-minute quick-charge can give you 1.5 hours of l