This Cyber Acoustics ACM-51B 3.5mm Desktop Microphone is a superior quality microphone that features uni-directional, noise canceling microphone element that reduces unwanted background noise effeciently. It is fully compatible with PCvoiceLINK sound card and features an adjustable arm ensuring that your voice will come through loud and clear. Its Noise-canceling feature reduces unwanted noise for better voice recognition and the Innovative PCvoiceLINK technology offers compatibility with all sound cards. 3 5Mm Connector Black Desktop Microphone. Cyber Acoustics ACM-51B 3.5mm Microphone (Black). (Black) .