Engraved Pocket Compass for Grandson Multi-functional metal compass with luminous Size: L*W*H: 2.36*2.36*0.79 Inches User Guidance: The compass must be held horizontally to turn freely. The red one on the pointer is the N pole and the white one is the S pole. When using the compass, keep away from ferromagnetic objects, high-voltage lines, electromagnetic devices, etc., to avoid errors and reduce the sensitivity of the compass Feature: ※ The indication direction is accurate, and the pointer returns quickly. When turning the compass, the pointer must swing left and right several times to point steadily. ※ Built-in damping oil enhances the stability of the pointer. It is very suitable for outdoor sports and harsh environments; ※ The average thickness of the copper shell is 0.2 mm, which is durable and can also effectively prevent the dial from being scratched and damaged. ※ The outer dial and needles have a luminous design, which is clearly visible in the dark after absorbing light