Logitech Zone 305 Wireless headset certified for business and ideal for mass deployment - Black

Logitech Zone 305 Wireless headset certified for business and ideal for mass deployment - Black Brand: Logitech Series: Zone 305 Part Number: 981-001452 Type: On-Ear Color: Black Driver Unit: 30mm Frequency Response: Frequency response (music mode): 50-20KHz Frequency response (talk mode): 100-7KHz Input Impedance: 32 ohms