Buy for €79 at quiesound.com
Whether you are practicing, rehearsing or performing; turning up your Strat will create a certain amount of hum and buzz, especially if you are playing under fluorescent lights or near anything that creates a strong electromagnetic field.
The Quiesound VST-1 gets rid of hum without getting rid of your tone. It is built to fit inside a standard Stratocaster Control Cavity, and requires no permanent modification to the guitar.
