3 In 1 Whistle for Sports, Hiking, Camping, Hunting & Fishing. This a new 3 in 1 whistle. Great for Sports, hiking, camping, hunting and fishing. Comes with a built in thermometer and compass. Has a cord to make carrying easier. It measures approximately 2 3/8" x 1 5/16" x 1 1/16"(54 x 33 x 27 mm) We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.