New item, open box. Bluetooth 5.1 Technology and One Step Pairing: Wireless earbud with bluetooth 5.1 technology and advanced chip owns fast and stable transmission without tangling, which makes the bluetooth headphones connect to electronic devices more consistently, providing you with an uninterrupted calling and music experience. Pick up 2 headsets from charging case and they will connect each other automatically, then only one step easily enter mobile phone Bluetooth setting to pair the wireless headphones. HD Stereo Audio and Crystal-clear Call: Earbud bluetooth wireless headphones are equipped the 14.2mm dynamic drives, it can provide deep bass and crystal crisp treble, making you feel like you are listening to a concert on stage. Noise cancelling earbud adopt bluetooth 5.1 tech, which filter and process ambient noise while having phone calls, microphones capture your clear voice for transmission to the listener, your sound will be heard clearly and loudly. Q20 are perfect for calls, music. Comfort Design for Sports: The Wireless earbud bluetooth included soft, flexible and secure-fit ear hooks are specially designed, which can fully fit your ears contours and maximally Assurance a comfortable wearing experience without falling out. Bluetooth earphones come with 3 sets different size of silicone caps ensure easily and comfortable wearing.