CEDIA 2015: Channel Vision SI-700 Intercom With Amplified Noise Cancellation PC BoardOctober 18, 2015 | Home / October 18, 2015 rave-video / CEDIA 2015: Channel Vision SI-700 Intercom With Amplified Noise Cancellation PC Board CEDIA 2015: Channel Vision SI-700 Intercom With Amplified Noise Cancellation PC Board