Bragi The Dash - Truly Wireless Smart Earphones with Leash (Black) Totally wireless. Bilateral balanced armature speakers Internal storage for music playback (4GB) Able to determine steps, pace, distance, and Heart Rate. Visualize your biometric data with the Bragi App. Ability to act as a phones Bluetooth headset. Control the total isolation or transparent mode. Waterproof and able to swim with it (1m)