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

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