Weighing in at about 75 grams and fitting in the palm of your Hand. This is probably the smallest Digital Square Dance system around. The ST-1 is a full Digital One Man system running Volume, turning the Music on and off and even doing things like fade in and fade out. You can change the direction and even how far you have to turn the Wheel to turn the volume to maximum and back down. It works with all the well-known Music software for Square Dance. Because it`s easy use it is perfect for New Callers and old pro alike.