Shokz OpenSwim Bone Conduction Open-Ear Mp3 Swimming Headphones Black. OpenSwim (formerly Xtrainerz) is engineered with Shokzs signature open-ear design and 7th generation bone conduction technology to ensure bud-free comfortable listening all day in or out of the water. OpenSwim is completely waterproof and submersible and features four gigabytes of MP3 storage enabling athletes to train harder; no wires no devices no limits. Specifications for Shokz OpenSwim Bone Conduction Open-Ear Mp3 Swimming Headphones: Manufacturer: Shokz Battery Life: 8 Hours Headphone Style: Bone Conduction Transducers Water Resistance Level: IP68 Features of Shokz OpenSwim Bone Conduction Open-Ear Mp3 Swimming Headphones Internal Music Storage Only Not Bluetooth Compatible Not Bluetooth Compatible IP68 Waterproof 8-Hour Battery Life Comfortable Under Swim Cap Package Contents: Shokz OpenSwim Bone Conduction Open-Ear Mp3 Swimming Headphones Shokz S700-ST-BK-US: OpenSwim Bone Conduction Open-Ear Mp3 Swimming Headphones Black