Buffalo Filter’s Remote Switch Activator (RSA) works with its PlumeSafe smoke evacuation systems to turn the smoke evacuator on/off in unison with the user’s electrosurgical generator. This eliminates the need for users to worry about conserving filter life without having to constantly turn the smoke evacuator on/off manually. The RSA responds to the noise emitted during either cut or coagulation mode on the electrosurgical unit. When the RSA detects the ESU making noise, the smoke evacuator is switched on. The unit is switched off when the electrosurgical unit is not in use. The user can set the Remote Switch Activator to respond to almost any electrosurgical unit’s sound waves.