Elloapic Professional Multifunction Military Army Metal Sighting Compass High Accuracy Waterproof Compass Made of upgrade material, this durable Compass can be used for a long time. Furthermore, this Compass is easy to install and operate , you can take it anywhere you go. With this Compass, travelling around the world is not difficult even for someone easy to get lost. Compass Size:8cmX6.3cmx2.5cm, package size:11.2cmx8.2cmx4.5cm The compass is Luminous, so you can see it clearly in the dark. Luminous effect will be showed after the compass receiving the natural light, fluorescent light, or UV irradiation in the daytime. The more light the compass received, the luminous result display longer. But if the compass did not receive radiation, no luminous effect will show.