Esperanza EH231K Bluetooth In-Ear Headphone TWS Black

Control type: Touch | Headphone frequency: 20 - 2000 Hz | Number of batteries supported: 1 | Frame material: Plastic | Wearing style: In-ear | Battery operated: Yes | USB connectivity: Yes | Maximum operating distance: 10 m | Transmitter frequency: 2.4 GHz | Bluetooth version: 5.0 | Battery type: Built-in battery | Ear coupling: Intraaural | Product colour: Black | USB cable length: 0.2 m | Talk time: 4 h | Battery technology: Lithium polymer (LiPo 4S) | User guide: Yes | Battery capacity: 300 mAh | Product type: Wireless headphones | Battery capacity: 40 mAh | Cables included: Charging cable | Recommended usage: Travel/recreation | Weight: 90 g | Bluetooth: Yes | Bluetooth profiles: A2DP, AVRCP, HFP, HSP | Continuous audio playback time: 3 h | Battery voltage: 5 V | Volume control: Buttons | Connectivity technology: Wireless | Volume control: Yes