Bluetooth USB Adapter NUT 2 BLUETOOTH 4.0 SMART TRACKER (BTU NUT-2)

-Noise Canceling Microphone: Yes (omni-directional)
-Connections: Bluetooth
-Multipoint Bluetooth: Yes
-Speakers:
Frequency response (music mode): 20 ~ 20 KHz
Frequency response (talk mode): 100 ~ 8 KHz
Sensitivity: 118.0±3 dB at 1mW @1 kHz
Driver size: 40 mm
-Microphone:
*Type: Dual omni-directional MEMS mics with directional beamforming and DSP
*Frequency Response: 100 ~ 8 KHz
-Built-in battery (Lithium ion)
*Battery life (talk time): Up to 18 hrs
*Battery life (listening time): Up to 20 hrs
-Controls: On-ear
-Charging: USB-C charging cable: 1.5 m
-Wireless:
*Bluetooth version: 5.2
*Wireless range: Up to 30 m (open field line of sight)