LINEPAUDIO B983 AC Ground Circuit No-Hum Buzz Eliminator, US Plug Product Details 1. No-Hum AC hum eliminator 2. Easy to use, just plug it in 3. Small and light, very portable, LED indicator 4. Suitable for use on 120V 60Hz grounded USA-style power outlets 5. The No-Hum is specifically designed to eliminate ground-related Hum and Buzz issues, quickly and easily. 6. Simply plug it in, and it filters low voltage from the ground line that causes audio ground loop hum and buzz Note that the Hum maintains a SAFE ground - NOT a ground lift 7. The No-Hum does not manipulate voltage in any way, and will not affect sonic quality of audio gear. 8. The No-Hum is not designed to solve cable or pickup related noise. 9. Simply place the No-Hum on the power cord of offending equipment to get rid of hum and buzz. 10. A built-in LED indicator shows that the No-Hum is working. 11. The No-Hum is suitable for use on equipment up to but not exceeding 6 amps of current draw. Specification 1. Product net weight: 0.18 kg 2. Product size: length: 80mm x 44mm x 32mm