[Comes with 32G memory capacity] built-in 32G SD memory card, bone guide headphones can provide you with more than 3000 music storage space. [IPX8 waterproof] This bone conduction earphone is waterproof up to IPX8, suitable for shower or swimming pool. [Restore HIFI sound] Panoramic stereo lets you experience every detail of the music [MP3 player] Support MP3, FLAC, WMA, AAC, WAV, APE and M4A formats. [Immersive experience] 360° surround sound generation, reduce leakage sound design, so that the sound and the screen keep pace [Hanging ear design, comfortable to wear] Let you experience the joy of music during sports [material close to the skin] even if twisted or bent, it not be deformed, 100 fold constantly. [Bluetooth compatibility] Mobile phones, tablets and computers can be connected and used through Bluetooth. Note: When using the headset for the first time, the battery must be fully . Don't swim for more than 60 minutes at a time. If you do not use it for a long time, please charge it at least once a month. Bluetooth connection is not supported underwater, please switch to MP3 mode. After each exercise, clean the water on the of the headset, especially the magnetic charging position, and clean it in time to prevent sweat and salt water from corroding the loading port and affecting the service life of the headset. Material: PVC colour: Black Package Contents: 1 x Bluetooth wireless headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.