Enhanced Aptx Codec: Hammer Swing sports wireless earphones deliver stereo sound for an immersive listening experience. Its APTX codec provides you a crisp and CD-like high-quality stereo sound. Dual Connection: Hammer Swing wireless earphones also supports Bluetooth dual point connection so you can switch between 2 phones conveniently. Sweat Resistant Sports Earphones: Hammer Swing wireless sport headphones adopt the IPX4 water-resistant Nano-coating, it can support extreme workouts and all-weather conditions. Bluetooth Earphones: Hammer Swing wireless earphone provides over 6-7 hours of music time/hands-free calling with a full charging time of 2 Hours. You could enjoy the long-time music time when you travel and do sports. For any product related query, service and warranty contact 99911 08081 or write to info@hammeronline.in