1pc Ground Loop Isolator, 20 Amp, 30 Watt **Eliminates Humming and Buzzing Between Audio Source and Amplifier Due to Ground Loop Issues **Filters Out DC Current in the Signal Path **Cylindrical Metal Case with Heat Shrink Tube. **Contain 28cm Long Interconnects, 2 Male and 2 Female RCA Gold Connectors **20 Amp, Input 30 Watt Max 60 Watt **Frequency: 20-30K Hz **Dimension: Dia. 36mm, 62mm Long