Unique Xtrainerz wireless headphones with Bone conduction technology to guide sound through vibrations across the cheekbones. The waterproof design with IP68 protection, which withstands total submersion in up to 2 meters, is ideal for practicing water sports. The headphones have 4GB of built-in storage and can store up to 1200 songs in MP3, WMA, AAC, WAV and FLAC formats. So you can listen to music and play songs with just one button without having to pair with other devices The powerful battery delivers a superior audio experience for 8 hours. In addition, the headphones offer low weight for comfortable wearing and quality sound with deep bass or high volume. The box includes a silicone carrying case, a USB charging cradle and one pair of earplugs.