Esperanza EH228K headphones/headset Wireless In-ear Calls/Music Micro-USB Bluetooth Black

Battery voltage: 5 V | Recommended usage: Calls/Music | Bluetooth profiles: HSP | Bluetooth profiles: A2DP | Base station colour: Black | Headphone frequency: 20 - 20000 Hz | Bluetooth: Yes | Talk time: 4 h | Battery type: Built-in battery | Control type: Buttons | USB connector: Micro-USB | Bluetooth profiles: HFP | Bluetooth profiles: AVRCP | Battery technology: Lithium Polymer (LiPo) | Frequency band: 2.402-2.480 GHz | Bluetooth version: 5.0 | Connectivity technology: Wireless | Wearing style: In-ear | Battery recharge time: 1 h | Microphone type: Built-in | Intraaural headphones type: Earbuds | Product type: Headphones | Battery capacity: 40 mAh | Product colour: Black | Battery capacity (charging case): 300 mAh | Ear coupling: Intraaural