Comfortable foam ear cushion for all day use. 180-degrees speakers can be easily adjusted to your liking. Bendable boom mic. Apple Mac OS and Microsoft Windows PC compatible. MS Teams Certified. Also compatible with most major software. HD wideband audio. Noise-canceling microphone. 94 dBSPL± 4 dB speaker sensitivity. Impedance 32 ohm. SoundGuard: Acoustic limiting for protection against sounds above 118 dBA. G616 support limits the level to 102 dBSPL. Microphone frequency response : 100 Hz to 10 kHz optimized for PC wideband audio up to 6.8 kHz. Microphone sensitivity : -38 dBV/Pa ± 4 dB. Call answer/end button, volume, mute controls. Tone alerts for mute on/off and volume maximum/minimum. 2-year warranty. Sold by each. Black.