Sony WH-CH520

✅ Key Features & Specifications

Audio drivers & sound quality: Uses 30 mm dynamic drivers. Supports Digital Sound Enhancement Engine (DSEE), which helps restore audio detail lost in compressed music files — so even lower-bitrate tracks (e.g. streamed MP3s) can sound richer and more balanced.

Bluetooth connectivity: Bluetooth v5.2 — stable wireless connection with good range and support for common codecs (SBC, AAC). 

Multipoint pairing: You can connect to two devices at the same time (for example your phone and laptop), which makes switching between music playback and calls very convenient. 

Battery life: Up to 50 hours of playback on a single full charge. There's also a quick-charge feature: about 3 minutes of charging gives ~1.5 hours of playback — handy if you need a quick boost before heading out.

Design & Comfort: Lightweight (~ 147 g), with soft ear pads and an adjustable headband. On-ear cushions and swivel earcups make them comfortable for everyday use and easy to fold.

Built-in Microphone & Calls: The headphones have an integrated mic, allowing for hands-free calling, voice assistant support (e.g. Google Assistant / Siri), and clear call quality — useful for online meetings, WhatsApp calls, or voice notes.

App support & Customization: Compatible with Sony Headphones Connect app — you can adjust EQ, change sound presets, and (if the track supports it) even enable 360 Reality Audio for a more immersive spatial sound experience.