<b>Dozod BH11 over ear wireless headphones introduce advanced bluetooth 4.2 technology and dual 40mm large-aperture driver unit, give you immersive sound quality with deep bass and crystal clear treble. The memory-protein ear cushions and 90° swiveling ear cups ensures lasting comfort and provides excellent durability. A protective premium case not only helps you store it better, but also helps you carry it easily when traveling. Up to 15 hours music play time on a full charge, perfect for gym, travel, office work. </b> <br><br><b>Note </b> <br>-Non-Bluetooth enabled TVs need a separate bluetooth transmitter to pair with. <br>-Built-in microphone & control buttons do not work in wired mode. <br>-Bluetooth operation range may be affected by obstacles (concrete walls, doors, etc.) and other environmental factors. <br><br><b>Specification</b> <br>-Bluetooth version: 4.2 <br>-Frequency response: 20Hz-20KHz <br>-Driver size: 40mm <br>-Bluetooth range: 33 Feet (10 meters) <br>-Talk time: Around 18 hours <br>-Music play time: Around 15 hours <br>-Charging time: 2-3 hours <br>-Charging voltage: DC 5V <br>-Battery capacity: 430mAh <br><br><b>Packing Contents</b> <br>-Dozod Foldable Bluetooth Headphone <br>-USB Charging Cable <br>-3.5mm Audio Cable <br>-Carrying Case <br>-User Guide