Wireless In-Ear Headphones,Bluetooth®, Up to 15 hours battery life, Buttons located on each earbud allow the control of music/calls/volume, Frequency Response 20 – 20,000 Hz, Sensitivity 110 dB/mW, Impedance 16 ohms, Weight 60 g, USB charging cable (Type-A/Micro USB Type-B), EMicrophone Type MEMS - BLACK