http://www.flipkart.com/mi-in-ear-headphones-basic/p/itme2ug88qeyxp8g Key Features of Mi In-Ear Headphones Basic 20 Hz 20000 Hz Headset Frequency Response 16 ohm Headset Impedance Canalphone Built-in Microphone 3 mW of Max Power Input In the Ear Headset Wired Connectivity