The Philips SpeechMike Premium Air SMP4000 has reached its highest stage of evolution. Benefit from all advantages of the industry leading dictation microphone, without the constraints of a cable. Record your voice using a premium decoupled studio-quality microphone with a built-in noise reduction filter and achieve exceptional speech recognition results. Thanks to the revolutionary patented lossless speech technology, the SpeechMike Premium Air offers maximum mobility without any compromises. The device achieves the same high speech recognition performance as the standard SpeechMike Premium with a cable.