Awei T61 Wireless Bluetooth ENC Earbuds.

Feature:
Cost-effective model, dual ENC microphone
Chip version: 5.3 (Jieli 6973D4)
Battery capacity of earbuds: 35mAh*2
Battery capacity of charging case: 300mAh
Diameter of horn: 13mm
Play time: 6h
Talk time: 5h
Depth of noise reduction: ＞35dB
Specification:

Bluetooth version: 5.3 (Jieli 6973D4)
Supported protocols: a2dpavctpavdtpavrcphfpsppsmpattgapgattrfcommsdpl2cap profile
Battery capacity of earbuds: 35mAh * 2 (with protective IC but protective plate)
Battery capacity of charging case: 300mAh (with protective plate) Diameter of drive units: 13mm
Charging time: about 1h
Talk time: 5h
Play time: 6h
Standby time: 300h
Sensitivity of horns: 115±3dB at 1KHz
Impedance of horns: 32Ω±15% at 1KHz