DANYIN BH69 Unilateral Bluetooth Business Talk Headset Customer Service Wireless Voice Wheat(Black)

Microphone:1. Directionality: one-way2. Sensitivity: -44dB3. Impedance: within 2.2 kΩ4. Microphone size: about 6.5 x 5.0mm5. Straw length: about 23cmTrumpet:1. Impedance: 32 ohms2. Frequency response: 20Hz-20kHz3. Output sound pressure: within 96dB4. Plug type: USB + four-level single plug 3.5mm5. Bluetooth version: 5.06. Bluetooth distance: within about 10 meters7. Battery capacity: 160mAh8. Charging port: Micro USB9. Charging time: about 1.5h10. Playing time: about 8h11. Diameter: about 30mm12. Weight: about 117gFeatures:1. Adopt V5.0+BR+EDR+BLE Bluetooth technology version, fast transmission2. Composite biological diaphragm, wide sound range3. Built-in ceramic antenna, stable signal and high adaptability4. One-point microphone, reduce background noise and pick up sound more clearly5. 30mm neodymium boron magnet speaker, loud sound6. The unilateral body can be adjusted, and the steel bow beam on the left can be stretched about 1-2cm7. The rotatable angle of the straw is about 120 degrees, and the metal gooseneck has good fixation