An elegant and comfortable set of on-ear headphones with distinct sound quality. Perfect for listening to music or watching movies, the built-in microphone also allows you to use these for hands-free voice or video calls.18 ( l ) x 15 ( w ) x 7.5 ( h ) cmmaterial: ABS & PUbluetooth version 5.010m visible distancebuilt-in microphone supports call pick-up200mAh with lithium batterycharge time: 2 hoursplayback time: 4 – 6 hoursfrequency Response: 20 Hz -20K Hzsensitivity: 85db