?‍The waterproof swimming headphones can be deliver beautiful music to your ears. ?‍Bluetooth 5.0, built in MP3 and 16GB memeroy, IP68 waterproof, lighweight, only 28g. ?‍MP3/Bluetooth mode, HI-FI stereo crystal, great for swimming, running, hiking, cycling, fitness, yoga, etc. Specifications: Model: K9 Material: ABS Mode: Bluetooth + MP3 Bluetooth version: V5.0 Memory: 16GB Battery capacity: 250mAh Rated input: 5V/1mA Wireless distance: 10-15M Charging time: 2.5H Play time: 6-8H Waterproof level: IP68 Music formats: Support WMA, MP3, APE, FLAC. Packing List: 1 x bluetooth swimming headphones How to connect bluetooth? 1. Open the headphone Long press the "on/off" key for 3s, and the blue and red indicator light will flash alternately all the time. 2. Search "K9" device Turn on the bluetooth function of the mobile phone, and the""K9"" device name will appear in the search results. 3. Select "K9" Click and select "K9", and the device will be paired automatically. 4. Pairing successful If the bluetooth pairing is successful, there will be a prompt tone and the blue indicator will slow flashing. 5. Adjusted Volume If the sound of the headphone is low, the volume of the speaker can be adjusted through the mobile phone or volume key. Tips: 1. During headphone charing/data transmission, the headphone interface shall be wiped clean with a cloth, and there shall be no water residue, otherwise the host interface will be permanently damaged. 2. Any questions about this product, please feel free contact us.