Outdoor Camping Multifunction 10 in 1 Military Compass Survival Tool
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1. Thermometer to measure the ambient temperature.
2. Hygrometer to measure relative humidity.
3.LED lighting (replaceable battery, remove the magnifying glass ruler,
unscrew the three screws, then replace the battery)
4. The mirror field help, reflected sunlight, emits light signals.
5. The horizontal extent of measuring the level of mirror
6. Compass to measure magnetic azimuth.
(The compass has a plan, flat TV, reading function)
7. Whistle field help, audible and visual signals.
(With a pick to push the plunger to launch a whistle taken from the hole)
8. Flint field help, make fire only.
(With pick-launch flint and tinder putter blade from the push to take the hole)
9. Magnifying glass to find the coordinates on the map.
10. Ruler to measure the distance