High-quality Stereo Bass Earphones In-ear style is better for noise reduction Never miss your call when listening to music with the built-in microphone Support Voice Calls, Adjust Volume, Switch Songs Impedance: 16 ohms ±15% Frequency response: 20Hz - 20KHz Connector: USB C Cable Length - 1.2M Colour - Black/White Compatible with: Mobile phones/Tablets with a USB C Port NOTE: THESE EARPHONES WILL NOT WORK IF YOUR DEVICE HAS 3.5MM SOCKET WITH USB C. THESE WILL ONLY WORK WITH A SINGLE USB C PORT ON MOBILE PHONES/TABLETS.