1,Excellent sound quality 2,Min Size 3,Lightweight, 4,Mobile enhancement Bluedio Edv20 Such as the great vibration effect with the Disco music! Let's feel and experience this amazing sound effect! ln addition, this product is compatible with various mobile phones that have music playing function, psp, Iphone, ipad, ipod etc.Performance: Cord length (m):Left 1.25m,right 1.5m (including controller) ...