feature: Keep away from electromagnetic, safe driving and convenient. Good flexibility, prevent twisting and durable. This product is suitable for IOS and Android devices by adjusting the switch. specification: Color: black, white, blue, red 1. Plug type: 3.5mm straight plug 2. Speaker resistance: 16Ω 3. Speaker unit: 8mm 4. Frequency range: 20Hz~2000Hz 5. Rated power: 100 mw 6. Sensitivity: 108 db/mW 7. Headphone length: approximately. 1 m / 3.3 feet 8. Wire: enamelled copper wire (perfume profile) Operation method: The product has a button to control the phone, one time to receive, hang up the phone and pause the music; two times can resume the music playback during the music pause; directly play twice to switch to the next song 1. [Unique earplugs] ergonomically soft high-flexibility nipple-class silicone earplugs and use 120. Tilting the ears to create a fit will not fall off and can effectively isolate external noise. Very suitable for travel, running, fitness or gym. 2. [Magnetic design forms a sporty appearance] The built-in magnet can support two headsets that will mutually be on your neck when not in use. 3. [Radiation protection] The metal shielding wire reaches 99% perfectly. The double Sonic nozzles have no magnetic field radiation. The metal cavity and trachea reduce radiation. It is suitable for different people like children, pregnant women, etc. 4. [Compatibility] Very suitable for compatible with APPLE devices | Android smartphones | Windows phones | Portable music players such as compatible with iPhone 6s, 6S Plus, compatible with iPhone 5S, 6, 6 Plus, compatible with Samsung Galaxy and NOTE series, Nexus, HTC/compatible with IPAD/notebook Computer tablets, etc. 5. [Warranty] 12-month worry-free limited guarantee You can enjoy a perfect refund or replacement without status for 12 months from the date of purchase. If you have any questions, please contact kinden as soon as possible