Esperanza EH239K Bluetooth In-Ear Headphone TWS Black

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