Ultra small, light weight and super fit earbud with all-day comfort, natural ambient sound, advanced noise cancelling, automatic Adaptive Sound Control and immersive sound. This product is the Sony WF-L900 Headset, featuring True Wireless Stereo (TWS), in-ear listening for calls and music, and Bluetooth connectivity. Enjoy Hi-Res Audio Wireless & DSEE Extreme with 5mm Dynamic Drivers and Active Noise Cancellation (ANC).