The Bluetooth headphones feature A2DP, APT-X audio decoding technology. This provides high stereo, CD-like quality sound. IPX5 sweat-proof and light-weight design make it perfect for use when exercising. The ergonomic design and comfortable silicone material ensure secure and snug fit so it will stay in place while running. The headphones will allow 8 hours of continuous music playing time and 360 hours standby time. Built-in magnet lets you attach the two headphones together when not in use. Take it with you, and make your workout more enjoyable.