See the technique of using a hand-held sirens to locate coyotes in the Elk Inc "Coyote Tatics" Dvd. The "Mini 10 Watt" - Locating siren has a effective range up to 2 - 2 1/2 miles - Coyotes hear much better then we do! The siren runs on four(4)"C" cell batteries, 10 Watts, bell diameter 6", length 10", foldable grip and hand strap lanyard - Great for traveling from stand to stand. May differ slightly from picture.