This headset's ergonomic, lightweight, and thicken ear hook flexible design gives you freedom of movement and exceptional performance for any occasion and the metal frame fits comfortably for users wearing glasses, hats, or headphone. The beige flesh toned color of this wired over ear head set microphone system blends in w/ various skin types and is practically invisible. Powerful, High sensitivity cardioid headset microphone amplifies your voice, stable signal, zero delay & crisp, vibrant audio transmission, this affordable, innovative and reliable corded headset condenser microphone is for any voice audio and speech application. · Product Parameters: Type Condenser Directivity Cardioid Sensitivity 18mv/Pa (-45dB±3dB) Frequency response 100~20KHz Output impedance 1KΩ±30% Working voltage 2.0V-10V.DC Signal to noise ratio ≥64dB Cable 1.2M(47.24 inch)