The compass is a 20mm compass and is liquid-filled and the entire background glows in the dark.
In addition to being great for putting on a watchband it’s also great for paracord bracelets and other paracord projects.
Like all liquid-filled compasses they might have an air bubble, when they make them they try to make them without those, but an air bubble will not affect its accuracy. Also, sometimes compasses need to be jiggled a little bit in order for them to give an accurate reading of direction.
The hold for this compass you might not be able to use to fit any compass or thermometer that is 20mm, it has a little glue between it and the compass so you might not be able to just press into the bottom of it and have the compass come out. Since it is a compass the inside turns depending on the direction so there is no need to align it so up for it is the same as up for your watch.
To use a liquid-filled button compass: put it on a flat surface or hold it as flat as you can in your hand with the compass face up and if it doesn’t automatically start to rotate to point to north then hold it between your thumb and index finger (with the compass as flat as you can get it with the compass face up) and jiggle it a little bit and then it will start to rotate to point to north fine unless it has a little air bubble lodged underneath the compass face (the air bubble is jamming it so it still won’t rotate) so then you have to shake it rather hard (with the compass face up) but then once the air bubble comes up to the top of the compass face it will then rotate to point to north fine. And they can also be thrown off of giving an accurate reading if they are near metal, or near magnets, like for example if they are near other compasses.
Compasses that are liquid-filled can leak if damaged and are heavier than the same-size compass that is non-liquid-filled but it takes less time to get an accurate reading than a non-liquid-filled compass because the inside of the compass doesn’t wobble back and forth which causes you to have to wait 5 seconds or so for it to “settle down.”
The Sun rises roughly in the east and sets roughly in the west, but when the Sun is directly overhead as well as at night you can’t rely on the Sun for direction. In the Northern Hemisphere there is the North Star (Polaris) and in the Southern Hemisphere the Southern Cross to guide you at night, but sometimes the stars are obscured by clouds. The solution to these problems is a compass, and a compass requires less training to find direction with and is an easier and more accurate way to find direction even if you know how to use the Sun and stars for direction. Also GPS might not work in an emergency, but a compass will.
Despite glowing in the dark, glow in the dark stuff is perfectly safe, it’s not radioactive, it’s made with phosphorescent materials, how it works is it’s charged up by a light absorbing its energy and then when the light is tuned off glows in the dark releasing that stored energy gradually diminishing in brightness until after over 30 minutes later is not glowing at all anymore until it’s charged again and it can be charged and depleted an infinite amount of times and still glow in the dark after being charged. Glow in the dark stuff that is charged by a light is also known as being photoluminescent. Glow in the dark stuff also fluoresces under a black light as well as receives some amount of a charge from one.
Perfect for EDC (Every Day Carry), your BOB (Bug Out Bag), as well as survival kits and emergency preparedness in general.