High Definition Wired Dual In-Ear Headphones High Resolution Heavy Bass Noise Cancelling Earbuds with HD Microphone for Smartphones Laptops Ipads & Gaming Devices HD DUAL UNIT - The woofer and the tweeter are connected in parallel with two units UNIQUE ERGONOMIC DESIGN  In ear angle is just right, not easy to fall off UNIVERSAL FIT - compatible with iPhone, iPad, iPod, Android devices and all 3.5mm jack devices INNOVATIVE AUDIO JACK - We found that many users in the use of headphones, only hand-pull headset line, resulting in potential damage to the headset, the problem is the main cause of damage to the headset. Therefore, we designed a new structure plug in line with engineering mechanics and ergonomics, effectively avoiding this problem CUSTOMIZED WIRE - We care about every potential will affect the sound quality of the details, so we customized the fever headset wire, wire tough and soft and through environmental testing, AC / DC pressure test, rated voltage test, swing test, tensile test, lifting test , Bending test, only to ensure that V1 can adapt to all-weather operations, to bring you a different pure voice. the use of custom wire can ensure it is not easy to winding