Cool Bora wired headphones compatible with Android and iOs. The hands-free kit consists of a simple design that highlights a distinctive look and perfect sound. They fit perfectly with an insulation against outside noise for music enjoyment and calls. These headphones have a push of a button answering machine and a built-in microphone. Technical features: stereo Built-in button on the cable, located behind the microphone (pause and switch song). 10mm diameter speaker. Speaker impedance 32 ohms frequency: 20 Hz to 20 kHz. Sensitivity: 105dB, Audio port: 3.5mm stereo audio comments.