Esperanza EH239K Bluetooth In-Ear Headphone TWS Black

Connectivity technology: Wireless | Cables included: Charging cable | Battery type: Built-in battery | Bluetooth: Yes | Battery voltage: 5 V | User guide: Yes | Battery technology: Lithium polymer (LiPo 4S) | Weight: 90 g | Product colour: Black | Warnings: Do not use near sources of heat or flame. | Warnings: Regularly check the condition of the batteries to prevent leaks. | Number of batteries supported: 1 | Warnings: Keep away from children. | Headphone frequency: 20 - 2000 Hz | Frame material: Plastic | Volume control: Buttons | Control type: Touch | Ear coupling: Intraaural | Talk time: 4 h | Wearing style: In-ear | Volume control: Yes | Battery capacity: 230 mAh | USB cable length: 0.2 m | Bluetooth version: 5.3 | Battery capacity: 30 mAh | Product type: Wireless headphones | USB connectivity: Yes | Recommended usage: Travel/recreation | Battery operated: Yes | Bluetooth profiles: A2DP, AVRCP, HFP, HSP | Maximum operating distance: 10 m | Transmitter frequency: 2.4 GHz | Continuous audio playback time: 3 h | Included cable : USB C / USB C PD