Plantronics Audio 345

Plantronics Audio 345 headphones use comfortable fit arc behind your head. Their ergonomic microphone can be adjusted according to your needs. The microphone is equipped with a noise-canceling, which ensures excellent speech recognition. Headphones are suitable for internet telephony and all VoIP applications. The headphone is the volume control.
Specifications:
Headphones:
Frequency response: 20 Hz - 20 kHz
Impedance: 32 ohms
Microphone:
Frequency range: 100 Hz - 8 kHz
Sensitivity: -39 db
Impedance: 2000 ohms
Interface:
2x 3.5 mm jack for PC/Laptop
Length of cable:
3 m