HP HP Poly EncorePro 540 Convertible Headset +Quick Disconnect - Foam / Black

Compatibility Compatible with PCs via QD (Quick-Disconnect) Color Black Boom mic length (mm) 135 mm Sensitivity (microphone) -38 +/-3 dB Signal-to-noise ratio >50 dB Cable length 890 mm Headphone type Convertible Microphone type Noise cancelling Speaker bandwidth 150 Hz to 6.8 kHz Microphone bandwidth 20 Hz to 16 kHz Boom mic rotation 290° Ear cushions Foam (padding material) Compatible Operating Systems Windows 11; Windows 10; macOS