Bluetooth 5.2 and Clear CallThe wireless headphones are equipped with Bluetooth 5.2 chip for more stable connection, faster transmission speed and stronger signal. Mic with environmental noise reduction technology work together to monitor the sounds around you and instantly produce an opposite signal to reduce background noise, allowing you to hear crystal clear calls like you are communicating face to face with others.Comfortable and Earhook DesignedUnlike ordinary in ear earbuds, it is designed with soft, flexible and secure fit ear hooks aimed at fully fitting your ears without falling out even for intense workouts.Fast Charge & 8 Hour Playtime The earbuds provide up to 8 hours of listening or talking time. With USB quick charge, it only takes 1~1.5hr to charge the earbud. You have the state of charge of your sport earphones under control at all times.(Note: Please fully charge it for the first use.)IPX4 waterproof & Universal Compatibility IPX4 waterproof technology well protects wireless headphones from sweat and rain during intense workouts or daily use. And it compatible with Android, iOS, Windows and so on, perfect for Sports, Workout, Running, Jogging, Gym Exercise, active Audiobooks, Watching TV, or SleepHi-Fi Stereo Deep Bass & Great giftTrue Wireless Stereo Great Gift for anyone featuring latest Bluetooth 5.2 technology and state of the art acoustic components that produce incredible sound quality with deep bass and crystal clear treble. Extremely light weight, simply take it out of case and it enter pairing mode without messy tricks. It is an excellent birthday gift for friends and family.