Esperanza EH239K Bluetooth In-Ear Headphone TWS Black

Bluetooth profiles: A2DP, AVRCP, HFP, HSP | Recommended usage: Travel/recreation | Volume control: Buttons | User guide: Yes | Battery technology: Lithium polymer (LiPo 4S) | Ear coupling: Intraaural | Product colour: Black | Battery type: Built-in battery | Connectivity technology: Wireless | Weight: 90 g | Volume control: Yes | Talk time: 4 h | Bluetooth: Yes | Number of batteries supported: 1 | USB connectivity: Yes | Bluetooth version: 5.3 | Battery voltage: 5 V | Battery capacity: 30 mAh | Cables included: Charging cable | Product type: Wireless headphones | Battery capacity: 230 mAh | Control type: Touch | Maximum operating distance: 10 m | USB cable length: 0.2 m | Wearing style: In-ear | Battery operated: Yes | Transmitter frequency: 2.4 GHz | Included cable : USB C / USB C PD | Continuous audio playback time: 3 h | Headphone frequency: 20 - 2000 Hz | Frame material: Plastic