2 pack phone earphones,aux headphones,3.5mm wired headphones control and microphone compatible with phone. 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