<strong>ZDAGO Warranty Policy</strong>:Backed by a 12 Months Warranty & Carefree Service for Every Purchase<br><br> If you have any issue with our headset at any time, please always contact us first before leaving feedback/review.:<br><br> We will strive to fix the issue to your full satisfaction Guaranteed !<br><br> ●How to use Smart Button in-line Control:<br><br> Press: Answer/end phone calls<br><br> Long Press: Reject phone calls<br><br> Press Once: Play/pause music<br><br> Press Twice: Next track<br><br> Press Three: Previous track<br><br>●Specification:<br><br> Brand name: ZDAGO<br><br> Speaker dimension:φ10mm<br><br> Impedance: 16Ω<br><br> Sensitivity: 100dB S.P.L.at 1KHZ<br><br> Rated power: 3mW<br><br> Power capability: 30mW<br><br> Frequence response : 20Hz-20,000Hz<br><br> Cable length: 1.2±0.15m<br><br> Plug type: φ3.5stereo<br><br> Pouch size: L9*H8.5CM