Outdoor Multi Function Pure Copper Clamshell Compass With Luminous Pocket Watch Compass Portable Metal Measuring Ruler Tool|Compass Pure copper clamshell compass with luminous pocket watch compass portable outdoor multi-function metal measuring ruler tool Product Information: ? Product Name: Pure copper outdoor multi-function compass pocket watch ? Product material: pure copper color box + OPP bag packaging box size ? Product weight: 52g ? Product size: 48mmx13mm ? Product Description: Pure copper to create a stylish pocket watch styling flip waterproof 360-degree rotating compass ? Product Description: This compass has a luminous function after light irradiation, and the built-in damping oil works at a temperature of minus 20 C to 50 C. The Method Used By The Compass: 1. The compass must be held horizontally so that it can rotate freely. 2. The w on the dial represents the west, N stands for North, E stands for East,S stands for the south 3. The red on the pointer is the N pole, The white is the S pole. 4. Do not approach the ferromagnetic object when using the compass. High voltage lines and electromagnetic devices, etc., to avoid errors and reduce compass sensitivity.