Product Features: 1. Driver unit: 10.0mm 2. Diaphragm thickness: 6aa 3. Response range: 20-20,000HZ 4. Impedance: 32aa Product Features: ... -20,000HZ 4. Impedance: 32Ω 5. Distortion: <2% (1mW at 1kHz) 6. Input: Φ3.5mm stereo plug7.Colors : back,white ,red ,blue,greennote ... : Does not support the volume control 3.5mm Metal Stereo Earphone Headset for HTC /iphone