The medium sized cowbell is an inexpensive way to track the movement of your close ranging dog in thick cover, as the ringing sounds from where they are. The ringing stops when they go on point and you move in to where you last heard the bell ringing. Steel bell with nylon strap that slips over a collar up to 1 in. in width. The bell is 1 5/8 in. by 1 ½ in.