Material Type:Metal Model Name:RCA Audio Noise Filter Special Features:RCA Audio Noise Filter Voltage:12V Origin:Mainland China Item Type:Frequency-separating filters Feature: Eliminates humming and buzzing due to ground loop issues Filters out DC current in the signal Connectors: 2x RCA Male, 2x RCA Female Passive in-line device Current Rating: 20A Rated input: 30W Pk Input: 60W Dimensions: 35X65MM Eliminate ground loop humming and buzzing noise between an audio source and an amplifier. When used with car audio, this isolation circuit goes between the head unit and the amp or EQ. Package included: 1pcs RCA Audio Noise Filter hello, guys, thank you for visiting my store.if you want buy more than we listed, please contact us.If you need more this item ,you can contact us.we will give you our best price. Leave your message!