Cyber Acoustics 2.0 Speaker System gives stereo audio for your system. Plug in headphones with the included 3.5mm jack on this Stereo PC Speaker System for easy access. 2.0 Black Stereo Speaker. Black 2 Piece Amplified Computer Speaker System 1. This two piece (2.0) system is designed for those who are price conscious, have limited desktop space, want good idelity and demand a clean elegant design. It is a proven work horse speaker that offers solid audio performance, built-in headphone jack for privacy (when needed), cloth grills and inger tip control. It is a great speaker solution for corporate, government and educational needs.