... tone volume switch volume lever switch tune switchtune regulator,tune control switch,sound switch,sound control switch,sound operated switch Tune switch description:When ... the purpose of the protection of transformers. Tune switch character:1.Its operation is easy,connect convenient, ... . Technique parameter1.input capacity:6W2.style:transformer3.tune level:54.Working voltage:AC180V-250V or AC85-135V 50 ...