WH-4 series volume controller adopts streamlined design, rounded corners. The panel is treated with color oil injection, the color is bright and lustrous, and it can effectively resist scratches; The use of high-quality environmentally friendly ABS plastic, harmless to the human body, impact resistant, not easy to deformation; With the rated power of 6W/30W, it also support expansion of 30W, 60W, 120W, 200W four kinds of power; Support two-wire system and six-wire connection mode;
Comes with relay, the product supports emergency broadcast signal strong insertion alarm function. (WH-4F)