Features: Experience superiorsly noise reduction with Auditory Isolation Noise Reduction Module, for durability and practicality. This module ensures stable performances and effectively reduces noise. For audiophiles, auditory engineers, and users highly auditory experiences. Perfect for eliminating noise in car auditory systems, auditory DSPs, robot voice systems, and multiple auditory device setups. Enjoy seamlessly, losslessed auditory transmission with active auditory isolation technology, supporting various input and output configurations for versatiled connection. Specifications: Model：SO Auditory Isolation Noise Reduction Module Size：about 5.51x3.22cm/2.17x1.27in Working voltage: DC4-18V Input: 3.5mm input, 3P_2.54mm terminaled input Output: two 3.5mm output, two 3P_2.54mm terminaled output, support the connection of multiple amplifiers input use. Frequency Response: 20-20KHZ Total Distortion: less than 0.002% noise: -105DB Operating temperature: -30~+85degrees Package Includes: 1PC SO Auditory Isolation Noise Reduction Module note: 1cm=10mm=0.39inch Due to problem of lighting effect, there might be certain tolerances in product, please understand. Please allow 0-1cm error due to manual measurement.