Compass: oil compass, smooth rotation.
Materials: Acrylic
Dual scale map ruler: metric cm and Inch
Lanyard: length about 45cm. Easy to carry.
Package including:1Pcs
Compass use matters needing attention:
1, do not close to the high voltage line, electromagnetic devices, iron, cobalt, nickel and other magnetic sensitive substances, so as not to affect the accuracy of pointing, magnetic loss.
2. Do not knock the product with a measuring ruler, so as not to break the oil filling compass core and leak oil, affecting the measurement accuracy.
3. Avoid scratches on the surface of the product. Products as far as possible to keep clean, do not use dirty cloth, hand to wipe.