This is a multifunctional whistle with built in thermometer, compass and magnifier, etc. It is easy to use and carry, suitable for daily and outdoor use. It's perfect for camping, hiking and outdoor activities. It is an little present and handy tool. Feature - Color: Black. - Material: Plastic. - Size: About 6.5 x 3 x 3cm. - Light weight multipurpose whistle black plastic construction with compass and thermometer. - With neck strap, easy to carry. - With mini compass and thermometer on each size of the whistle. - Excellent for camping, hiking and outdoor activities. - It is an little present and handy tool. Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you