Check the listing for details. Frisby M-20 Flexible Stand Alone Microphone for PC. Color: Black, Condition: New. Listed at 10.99 USD. The Frisby M-20 Flexible Stand Alone Microphone for PC Computer Laptop Notebook Skype Voip is a noise-cancelling microphones with a black color and 3.5mm jack connectivity. The microphones are designed to cancel out background noise, making them ideal for use in noisy environments. The Frisby brand is known for producing high-quality computer accessories, and these microphones are no exception. They are perfect for use with laptops and desktops, and are a must-have for anyone who needs to make clear, noise-free recordings or voice calls. Mic dimension: 9x6.7 mmDirectivity: Noise CancelingFrequency range: 100HZ-16KHzSensitivity: -55db±2dBSensitivity reduction: -3dB at 1VS/N rate: More than 36dBImpedance: 2.2kΩOperation voltage: 1.5VPlug Type: 3.5mm jackCord Length: 3mUsage: Laptop, PC