Description:4-Channels, composed of two pairs of stereo (L+R) inputs and outputs, it can ensure that the shield ground on each audio cable isolates from any equipment ground.It is an practical audio equipment that can eliminate ground loop humming and buzzing noise between an audio source and an amplifier.Portable noise filter is made from the ABS and metal material, which can prevent the buzzing caused by ground loop problems..The length of cable is 24cm.It is placed between the head unit and the amp or EQ.Item Name: Noise FilterMaterial:ABS,MetalMaximum Power: 100WInput Power: 50WConnector Type: 4 x RCA Male, 4 x RCA FemaleSize Details:Cable Length: 24cm/9.46" (Approx.)Size: 9cm x 4.5cm x 2.2cm/3.55" x 1.77" x 0.87" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 X Noise Filter