1. WisWinDa Pro X4 is Multi Channels Ground Loop Noise Isolator/Noise Filter which support XLR/ 6.5 /RCA/ 3.5 connectors could help you to reduce the noise from the car&home audio electric system, gives you HiFi quality sound output. Perfectly solve car and home stereo ground loop noise problems. ^^
2. Pro X4 is Multi Channels Hum/Buzz Eliminator is Play&Play design wtih high quality aluminum shell, sturdy and resist, which has long durability.
^^ Input: 3.5 AUX*1, XLR X 2, 1/4" TRS x 2, RCA x 2
Output: XLR X 2, 1/4" TRS x 2, RCA x 2
Input/Output Impedance: 600 / 10K
Frequency Response: 20Hz-50KHz ( 0.2 db ref 1khz)
Level Breakdown: 0.7 db (ref 1khz 1V rms)
Insulation Impedance: DC1000V 100
Isolation Voltage: AC50Hz-60Hz / 0V-1500V ^^
Dimension: 4.6 x 4.15 x 1.9 inch ^^
Weight: 1.1 lb