Specification: Waterproof / Water-Resistant: Yes.  Use: Pointing Guide.  Outdoor Activity: Camp.  Model Number: Compass Watch.  Material:: ABS plastic.  Dial Display: Pointer.  Color:: army green.  Size: 8*4*2.5cm.  Weight: about 60g/2.12oz.  Quantity: 1pc.     Multifunction: 1. Thermometer: Measure the ambient temperature. (-20-60 ° C).  2. Hygrometer: Measure the relative humidity of the environment.  3. LED lights: convenient for you to use at night. Replace the battery:  (1) remove the magnifying glass and ruler (2) loosen the three screws (3) replace the battery.  4. Reflector: Ask for help in the countryside, reflect the sun, and send a bright signal.  5. Spirit level: determine the level condition.  6. Compass: Measurement of magnetic azimuth (the relative function of the compass to acquire data at the horizontal and vertical levels.).  7. Whistle: Call for help in the countryside, send a signal, (use the tappet to push the whistle from the third hole on the left).  8. Magnifier: Find a coordinate on the map.  9. Ruler: Measuring distance.     Package includes: 1 × Multi-function Compass