Havit E553BT Open Ear Air Conduction Headphones, black

Driver diameter: 15 mm | Warnings: Keep away from children. | Warnings: Do not use near sources of heat or flame. | Warnings: Regularly check the condition of the batteries to prevent leaks. | Product colour: Grey | Product colour: Black | Volume control: Button | Bluetooth range: 10 m | Talk time: 9,5 h | Recommended usage: Music / calls | Wearing style: Neck-band | Ear coupling: Air conduction | Length: 140 mm | Width: 105 mm | Continuous audio playback time: 16,5 h | Product type: Headset | Connectivity technology: Wireless | Headphone frequency: 20 - 20000 Hz | Input voltage (earpieces): 5 V | Control type: Buttons | Height: 57.3 mm | Battery capacity: 110 mAh | Microphone type: Built-in | Headset type: Binaural | USB charging: Yes | Bluetooth version: 5.3 | Package contents: Headphones | Weight: 23.1 g | Bluetooth: Yes | USB Type-C ports quantity: 1 | Battery recharge time: 2 h