Features: Effectively isolate the noise of grounding Rings, eliminate the interferences noise caused by the phase difference between long Sound cable and different Sound equipment, and bring you clean Sound. Double 1/4'' instrument balance and unbalance (1/4'') direct box structure is suitable for stage and studio applications.Eliminates the buzzing and buzzing caused by the grounding Rings by isolating the input from the output. The ground lift switches eliminates the typical grounding Rings problem. Eliminates annoying buzzing and buzzing caused by grounding Rings. Input conversion between 1/4inch cables and independent 1/4inch output port on the back can be used for bidirectional isolation. There are left and right independent grounding switches and grounding switches, which can avoid buzzing interferences caused by grounding problems. This professional grounding rings isolator is suitable for almost any electronic equipment that you need to eliminate noise. Such as sound systemS, subwoofer, karaoke speakers, mixers, guitar Specifications: Component:Metal Size:Approx.90x64x28mm/3.54x2.52x1.10inch Note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 1Pc Noise Isolator