Description: Brand: JOWAY Model: HP21<br> Driver: 8mm Dynamic monomer<br> Isolation: JOWAY sound system<br> Headphone sensitivity: 8dB (1kHz \/ 1Vrms)<br> Impedance: 16&amp;Omega;<br> Frequency response: 20-20000Hz<br> Cable length: 1.2M<br> Plug: 3.5mm stereo plug<br> Microphone Sensitivity: -42dBV \/ Pa Microphone: Yes<br> Color: black， white  Features: 1. Aluminum metal sound chamber， giving you the best audio experience.<br> 2. Use for: ipods， ipads， mp3， mp4， iphones， smartphone， PC， notebook and all devices with standard 3.5mm earphone jack.<br> 3. Telephone correct songs， listening to music and receive calls support.<br> 4. Adjust the song up and down， every touch time with you to the music of the times.  Package Include: 1x JOWAY HP21 In-ear Earphone