Hollow Groove: this thumb directional compass is comfortable to wear and has a hollow thumb groove, unique design makes you more comfortable to wear and use, and makes it easier for you to recognize the direction of your hand. Luminous point design: this thumb compass pointer has a luminous point design, which emits bright green light at night, easy to observe and use at night, and you can also judge the direction smoothly according to the dial at night. MULTIFUNCTIONAL: This directional thumb compass integrates compass, line of sight, centimeter scale, map scale and other functions. It is fully functional and can cope with various outdoor adventure scenarios. CLEAR SCALE: This compass has a clear scale, the clear scale is easy to observe and measure accurately, and easy to recognize. ABS MATERIAL: The map compass is made of ABS material, the shell has a texture, feel comfortable, can be used for a long time, the plastic is light and easy to carry.