Features:

4 levels of Noise Cancellation
Single Button Operation

Low power consumption
Low distortion to audio signal
Completely internal fitting - no flying leads
Visual and audible indication of filter level.
2 demonstration modes
 

White Noise reduction:

Level 1 = 11dB
Level 2 = 13dB
Level 3 = 19dB
Level 4 = 35dB
Tone reduction:

Level 1 = 5dB
Level 2 = 8dB
Level 3 = 21dB
Level 4 = 65dB
 

$189.95 Includes installation and UPS shipping.