10-in-1 Outdoor Camping Multi-tool

Hygrometer:Measure for ambient relative humidity
Thermometer:Measure for ambient temperature
Compass:Measure for magnetic azimuth
Magnifier:Find a coordinate on a map
Ruler:Measure a distance
Reflector:Call for help in country-side,reflect sunlight to sent out the light signal
Whistle:Call for help in country-side,sent out the sound signal
Led light:Light
Flint:Wilderness survival by make fire
Spirit level:Determine level condition