Introducing the Poly SoundStructure C12 - Twelve-channel AEC / Noise canceller / Feedback reduction w/Auto Mic Mixing and Matrix Mixer.- Includes Australia power cord, user manual, software. | 2200-33120-012. As an Authorised Poly Partner, we offer the best price and excellent service. Our dedicated team is here to find your perfect solution. Request a quote or contact us now for prompt assistance.