TTSAM Multifunctional 3 in1 Emergency Survival Gear Whistle Compass Thermometer With Lanyard for Outdoor Camping Hiking 3 function: whistle, Waterproof thermometer, Waterproof compass Temperature range: -20~50 degrees Celsius, Size:6*3*3cm (2.4*1.2*1.2 inch) Green Body; Comes with Lanyard. On one side there is a compass, and the other is Celsius thermometer Durable plastic whistle and nylon neck lanyard Great for camping, hiking, hunting, fishing, boating, outdoor activities, travel, emergency/survival kits, etc.