The Nokia Micro Earbuds Pro take our unique micro form factor to the next level, with higher voice clarity and environment noise reduction. The angled design enables a secure fit that stays comfortable while listening. A good thing, too, since the earbuds provide up to 9 hours of playback time between charges. Features: 6mm drivers deliver big sound performance Dual-mic noise reduction captures and eliminate most environment noise for great voice clarity in calls IPX5 water and sweat resistance for music come rain or shine Dual-mode connection for easy automatic switching between using one or both earbuds for phone calls Micro charging carry case with USB Type-C charging and LED charge indicator Bluetooth 5.1 9 hours of playtime on earbuds Extra 19 hours with charging case Specifications: Dimensions: H:4.6 x W:6.4 x D:3.4 cm Colour: Black Guarantee:1 year Model Number: TWS-521