10 in 1 Multifunction Outdoor Survival Military Camping Hiking Compass Tool Kit Item Description: Compass: Measure for magnetic azimuth (Relative functions of compass: acquire data at horizontal and vertical level) Thermometer: Measure for ambient temperature Hygrometer: Measure for ambient relative humidity LED light: Lighting Reflector: Call for help in country-side, reflect sunlight to sent out the light signal Spirit level: Determine level condition Whistle: Call for help in country-side, sent out the sound signal.(use tappet to push out the whistle from the third hole at the left side) Flint: Wilderness survival by make fire. Magnifier: Find a coordinate in a map. Ruler: Measure a distance (3cm length) Dimensions (L x W x H): 75 x 39 x 25 mm Package Including: 1 x Compass