Features: This model uses the sighting optics which allows you to directly see the inner dial of the compass. The sighting window with the line of sight. The sighting optics calibration line helps you take advantage of the 1 resolution on the compass dial. Packing List: 2 x Compass Product size: Height : 6.9 cm Width: 5 cm Height: 1.8 cm Weight: 29g Product function: used for outdoor orientation and temperature measurement Scope of use: outdoor mountaineering, outdoor adventure, cycling, leisure outdoor, etc. Color: Black Quantity Shipped: 2 pieces Precautions: 1. Use it in a horizontal state to be as accurate as possible; 2. In order to avoid the confusion of the magnetic needle, please keep a certain distance from barbed wire and magnetic objects when using it. 3. Do not hit the objects with a survey ruler, so as not to affect the measurement accuracy. 4. Disc surface and lens should be kept clean, do not wipe with cloth or dirty hands; 5. It should be closed when not in use and placed away from ferromagnetic substances to prevent loss of magnetism.