Black Calls/Music In-ear Headset Wireless Bluetooth 5.3 10 m Intraaural Earbuds 20 - 20000 Hz Microphone type: Built-in Built-in battery Lithium-Ion (Li-Ion) Introducing LinkBuds Open: With an innovative ring driver, these earbuds offer a unique listening experience, allowing you to hear your surroundings perfectly while enjoying your music or podcasts.The ergonomic design fits comfortably in the ear whilst the new air cushion holds each earbud securely in place. With each earbud weighing just 4.8g, LinkBuds Open are ideal for all-day use, as well as sports.Enjoy perfectly balanced, high-quality sound with the specially designed 11mm ring driver. Sony's Digital Sound Enhancement Engine (DSEE) even restores high-frequency elements lost during compression, so every track is upscaled.With the easy-to-use EQ in the headphones app, you can tailor the sound to your taste.These wireless earbuds deliver up to 22 hours of uninterrupted playback (8 hours from the earbuds + 14 hours from the case