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 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. 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. Keep away from electromagnetic, safe driving and convenient.