product presentation1. sound adjustment: support high/medium/bass EQ adjustment, high/medium/bass can enhance +15dB and attenuation -15dB adjustment, support left and right channel balance adjustment, suitable for some need to adjust the tone of equipment, using compact and thin desktop mini design, compact size, compatible with any equipment2. Three sets of stereo mixed input :3.5mm+6.5mm+RCA3. provides three sets of stereo output simultaneously:RCA+RCA+3.5mm4. Independent Toner Audio Control: With independent audio source channel high/middle/bass control attenuations -15dB and +15dB gain, the sound adjustment design allows you to adjust the audio independently to listen to the experience and control the output volume independently5. simple installation: input and output plug and play easy installation, you can enjoy different audio experience6. USB 5V power supply, suitable for different applicationsProduct ParameterInput channel: 3-way stereo input 3.5mm+6.5mm+RCA interfaceOutput channel :3.5mm/RCA interfaceInput impedance :100K OhmOutput gain: high, medium and low -15dB and +15dBFrequency response: 20Hz-20KHzSignal to noise ratio: more than 107dBTotal Harmonic Distortion: less than 0.08%Intermodulation distortion: less than 0.01%Power supply:USB 5VNet weight: 0.38kgGross weight after packing: 0.53kgProduct size: length 130 mm X width 77 mm X height 38 mmPacking size: length 200mm X width 185mm X height 55mmKit list1 X Front Stereo Phoner High/Middle/Bass Adjuster1 X USB power cord, length 120CM1 X USB power adapter US standard