Mirrored Sighting Compass - With Adjustable Declination & Map LED Description Please note that this unit is balanced for use in the Northern Hemisphere only (incl. North America). ADJUSTABLE DECLINATION - Using the included key tool, you can easily adjust for the local variation between true North and magnetic North. CLINOMETER - For measuring slop angle of  the terrain such as hillsides and mountains MIRRORED - The reflective compass mirror can also serve as a flash signal mirror in an emergency situation. MAP LIGHT - The included micro LED helps map reading in low light conditions and activates the luminous glow features on the compass  Specs: Weight:  3.0 oz | 85 g Dimensions: 2.5" x 4.25" x .68" | 6.5 x 11 x 2 cm Resolution: 2˚in MILS Map Scale: 1:2400, 1:5000 Adjustable Declination?: Yes Phosphorescent Markings?: Yes Clinometer?: Yes Material: Plastic Package Contents:  1 x Compass 1 x Neck lanyard 1 x Micro LED light 1 x Mini Screwdriver