Count on the Atlas Sound AT35 to control the volume on your installed 25V or 70V sound system. It s ideal for school churches community centers or anywhere you have an installed sound system. The high-quality auto transformer offers excellent frequency response and reliable performance. Ten volume stops plus an off position make this control simple to use. The stainless steel wall plate is stamped with the dial scale and includes a skirted black knob. Control the volume with the Atlas Sound AT35 attenuator.