ITEM NAME:4-Pin RJ9 Hands-Free Call Center Noise Cancelling Corded Binaural Headset H N4F3 4-Pin RJ9 Hands-Free Call Center Noise Cancelling Corded Binaural Headset H N4F3 First, the use of the environment 1. Ambient temperature: -10 °C ~ +40 °C 2. relative humidity: 10% ~ 95% 3. Atmospheric pressure: 86 ~ 106kpa 4. environmental noise: less than equal 60dB (A) Second, the functional indicators 1, microphone (1), omnidirectional anti-noise electret condenser microphone; optional single-point anti-noise microphone, signal-to-noise ratio greater than 58dB (2), sensitivity -40 ± 3dB (0dB = 1V / Pa, at 1KHz); (3), impedance 2.2K ohms; (4), working voltage 2.0V; 2, the receiver (1), broadband high quality receiver; (2), the impedance is 150 ohms; (3), the frequency range is 100-6600HZ; (4), the distortion is less than equal 5%; (5), sensitivity 100 ± 3dB (1000, 12000, 1500, 2000HZ); 3, the connection plug (1), high-quality anti-sway, low-resistance PU headphone cable (with anti-stretch wire tensile material); (2), the cable length is 2.65 meters (including the plug), and other lengths of the earphone cable can also be provided according to the user's needs; (3), Optional with intermediate plug-in QD head, compatible with Plantronics or GN Netcom, with a plug-in life of no less than 10,000 times size:18*12*3cm Material:plastic colour:black Package Contents: 1 * Binaural Headset
