Dual microphone model – Steno SR Pro-2 is the industry's best voice isolation, noise cancelling, speech recognition microphone. Engineered with proprietary micro sound-booth technology that ensures uncompromising sound quality and noise cancellation. Where other microphones fail to deliver the Pro-2 steps up to the plate with: Adjustable voice tuning – permitting each individual to customize their mask for peak performance. An internal breathing port allowing you to speak and breath naturally. Tried and tested industry sound proofing and noise cancellation properties – 100% noise cancellation = zero background noise interference Patented ultra sensitive SmartMic microphone engineered for all ranges of voice tone. Complete accuracy even when you whisper Streamlined, lightweight and ergonomic design to relieve head, neck and hand stress Multiple hands-free options Best warranty and knowledgeable, no nonsense customer service The SR Pro series has the highest Dragon recognition accuracy rate of any Stenomask on the market. What's the secret? We've been engineering and manufacturing stenomask for over 75 years, in fact we invented the Stenomask. Steno SR (the SR stands for speech recognition) our 6th generation version is designed to work seamlessly with the latest digital technology, harnessing the boundless knowledge and experience that has been accumulated and refined over that time. Patented.