Andrea Communications C1-1022100-1 Model NC-181 On-Ear Mono (Monaural) PC Headset, Pro-flex wire microphone boom for perfect placement, Reversible for left or right side usage
Key Features

Proprietary noise-canceling microphone with windsock to minimize breath popping
Pro-flex wire microphone boom for perfect placement
40mm mono (monaural) speaker with deep bass sound delivers crystal clear audio
Comfortable foam ear cushion
Reversible for left or right side usage
Stainless steel adjustable headband folds flat for storage
Extra long 8-foot shielded cable with color-coded 3.5mm plugs for PC use
Well-built and cost-effective
Specifications
Connections:
Microphone Plug 3.5mm Pink
Speaker Plug 3.5mm Green
Microphone
Noise Cancellation 5 dB/octave
Frequency Range 100-10,000 Hz
Electrical Signal-to-Noise Ratio > 60 dB
Sensitivity at 1 kHz (0 dB = 1 V/Pa) -44 dB
Current Consumption
Headphone Speaker:
Frequency Range 50-20,000 Hz
Coil Resistance 32 ohm
Sound Output from 1 kHz 1mW 114 dB
Max. Input Power 40 mW