1 headphone amplifier; 2 2 in 1 concept headphone; 3 cushioned leather headband ... ; 6. for mp3, Iphone, Ipod, PC, CD, and other music audio sources; Technical Product Specifications:1. out speakers:8ohms; 2.0W ... ;2. inner speakers:32ohms;0.5w;40mm;108dB+/-3dB;3. audio jack;3.5mm,stereo, gold-plated;4. frequency response:20hz ...