SONY WF-1000XM3 Bluetooth Headset (Black, True Wireless). Control music tracks and volume, activate your voice assistant and take phone calls. Alexa enabled for voice access to music, information and more. Activate with a simple touch. A Bluetooth chip which transmit sound to the left and right ears simultaneously,coupled with optimised antenna ensures a stable connection and outstanding listening. Place your finger over the left earbud to turn the volume down for instant conversation. Just take your earbuds from case and wear it, it?s ready, Intelligent auto-power off through IR sensor which detects earbuds? status. Artificial intelligence learns and suggests places where user often goes to such as home, work, station and gym. Industry leading Noise Cancellation lends a personalized, virtually soundproof experience. If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears. Battery Life up-to 24 hrs with NC ( 6 hrs Earbuds & 18 hrs Carrying Case ) & 32 hours without NC ( 8 hrs Earbuds & 24 hrs Carrying Case ) and Conversation flows freely with easy, hands-free calling. The WF-1000XM3 headphones deliver clearer voice quality and you can take calls using either, or both, of the earbuds.