... (2)loosen three screws(3)change battery.4. Reflector: Call for help in countryside, reflect sunlight to ... powder.EM1883 Multi-Function Compass & Waterproof Container Function: Compass, Reflector, Flint & Striker, Whistle, Waterproof ContainerSize: 78*55* ... ./N.W.: 11/10KgsEM1884 Multi-Function Compass & Telescope Function: Compass, Reflector, Telescope, Magnifier Folding Size: 97*42*43mmStretch Size: ...