Havit E531BT bone conduction headphones, black

Wearing style: Head-band | Headphone sensitivity: 86 dB | Microphone type: Built-in | Continuous audio playback time: 7 h | Headphone frequency: 180 - 16000 Hz | Volume control: Button | Ear coupling: Bone conduction | Length: 132 mm | Bluetooth: Yes | Weight: 24 g | Recommended usage: Music / calls | International Protection (IP) code: IPX5 | Connectivity technology: Wireless | Talk time: 6 h | Product colour: Black | Battery recharge time: 2 - 3 h | Bluetooth range: 10 m | Headset type: Binaural | Control type: Buttons | Input voltage (earpieces): 5 V | Package contents: Headphones | Bluetooth version: 5.3 | Battery capacity: 140 mAh | Width: 106 mm | Standby time: 240 h | Height: 43 mm | Product type: Headset | Bluetooth profiles: A2DP V1.3, AVRCP V1.6, HFP V1.7 | Warnings: Do not use near sources of heat or flame. | Warnings: Keep away from children. | Warnings: Regularly check the condition of the batteries to prevent leaks. | Driver diameter: 16 mm