Bone conduction headphone, IP68 waterproof, come with adjustable silicone band, comfortable to wear, protects hearing well, suit for most people. Bone conduction headphone the sound vibrations go, by bone, straight to the inner ear, instead of insert your ears, it's protects your hearing well. Wraparound headband is made of Titanium alloy material, come with adjustable silicone band, lightweight(42g), wear comfortable, suit for most people. IP68 waterproof and sweat-proof, suit for all kinds of bad weather. It's great for swimming, running, jogging, workout, skiing, camping, walking, etc. What You Get? 1* Headphones Swimming 1*USB Cable 1*Manual Specifications: Model: K7 Type: Sports Headphones Material: Titanium alloy + silicone Mode: Bluetooth V5.0+ MP3 Player Memory: 16GB (store 4000+ music) Wireless Distance: 10M Battery capacity: 350 mA Frequency Range: 20-20kHz Microphone: Anti-interference -42dB Music formats: Support WMA, MP3, WAV, APE, FLAC, etc. Air Conduction Technology Built-in MP3 Player and 16G Memory Bluetooth 5.0, Waterproof IP68 Open-ear Design, Stereo Sound, Ultra Light Play Time 6-8h, Standby Time 15 Days Read more High Fidelity Stereo Professional lossless sound quality Bluetooth 5.0, wireless distance 10m Enjoy the music while still be aware of the surroundings Easy To Operate Open-ear headphones the physical buttons design as it prevent “accidentally”pressing touch sensitive buttons on other headsets. Long Battery Life Charge time 2H Talking/music time 6-8H Standy time 15 days Allows you enjoying the music for a long time. Read more