Plantronics EncorePro HW540, Monaural Headset, Noise-Cancelling Nástupce modelů Plantronics DuoSet H141N/A a DuoPro H171N/A OVERVIEW * Choice of three comfortable and easily switchable wearing styles - over-the-ear, over-the-head or behind-the-neck - offers more flexibility from a single headset to suit a wider range of user preferences * The new design is extremely light, offering users a more discrete headset and improved comfort for longer calls * Soft, luxurious ear cushions for excellent audio quality, while providing all day comfort * Visible guidance so the user can see when the boom is moved into the proper range for optimum microphone positioning * Higher-quality wideband audio meets official TIA920A standards and noise-cancelling microphone help raise the standard of phone conversations * Quick Disconnect supports multiple connectivities from USB, audio processor or Direct Connect and allows users to easily move away from their workspaces without removing their headsets SPECIFICATIONS Connects to * PC or deskphone with Plantronics audio processors Ideal for * Telephone intensive users, informal contact centres (e.g. helpdesks)and enterprise/office telephony users Type * Monaural Audio performance * Wideband audio (up to 6,800 Hz), noise-cancelling microphone TRANSMIT CHARACTERISTICS (TYPICAL) Sensitivity @ 1kHz * -39 ± 3 dBV/Pa Frequency Range * 150 to 6800Hz Output Impedance: * < 150 Ω Typical Test Conditions * 1.8VDC, 3.3K Ω DC Resis, 3.3K Ω AC Load TRANSMIT CHARACTERISTICS (TYPICAL) Frequency Range * 100 to 6800Hz Acoustic Limit * <24dBPa (<118SPL) Input Impedance * 150 Ω ± 25% Typical Test Conditions * 100mV Drive, 10 Ω Source Impedance. Measured on ITU-T Type 3.3 artificial ear, Ear Reference Point Compatibility tool * http://www.plantro.net/compatibility