Sony Wireless Headphones Bluetooth Design with dedicated app for settings that allow you to customize the sound quality to your B Small WH-CH520

We offer a wide variety of products, and the following precautions apply to some of them. Please note that they are listed for all products. 【Voltage Compatibility】Designed for Japanese voltage (90-110V). Using with a different voltage may cause malfunction. 【Plug Type】Japanese plugs (A or B type). Use a conversion adapter if needed. 【Transformers & Adapters】Transformers adjust voltage; adapters only change plug shape. Using an adapter without a transformer may damage the product. 【Liability】We are not responsible for damages caused by improper use, such as using the product without a transformer. With a good balance from highs to lows, you can enjoy natural and clear sounds from vocals and instruments. Furthermore, Sony's proprietary technology ``DSEE'' complements the high frequencies that tend to be lost in compressed sound sources, up to CD-quality sound within the headphones. Plays compressed sound sources using streaming playback, MP3, Bluetooth transmission codecs, etc. with spacious and good sound. It is compatible with the dedicated app "Headphones Connect", and by using the "equalizer" that allows you to customize the sound quality to your preference, you can select from 8 types of presets such as "Relaxed" and "Bass Boost", or create your favorite sound quality. It is possible to customize the equalizer settings. Adopts smooth, low-repulsion urethane foam ear pads with few wrinkles. The soft and comfortable ear pads are lightweight and comfortable to wear. Music playback is possible for up to 50 hours (*). Furthermore, it supports quick charging that allows for approximately 1.5 hours of playback (*) with a 3-minute charge (approximately 5.5 hours with a 10-minute charge). Hands-free calls (*) are possible with smartphones, iPhones, and PCs. *Smartphones, iPhones, and PCs must be equipped with Bluetooth functionality and compatible with HFP or HSP. Depending on the software and environment you are using, it may not be compatible.