Cammenga Tritium Wrist Compass J582T - Military Grade Compass Bracelet for Outdoor Adventure - Radiant Tritium Glow Compass for Dim Light Visibility

UPDATE: ANNNNNNNNND six months later it's broken. Inside rattles more than usual. Believe magnet has become un-attached under the dial.ORIGINAL: Great compass for your watchband, but only fits small watchbands without some creative modification...I used one piece of 550 paracord sheath to attach this to a 22mm NATO band, alongside my Casio solar-atomic watch. I used just the sheath of the paracord to reduce it’s thickness, making the compass sit flatter against the watchband and less likely to snag.At first I was kinda frustrated that they didn’t offer this for a larger size watch band, but now I don’t really mind because my modification worked great.I removed the core from a piece of paracord, leaving just the sheath. Then I threaded it through the compass and around the watch band, got it reasonably tight, and tied a square not. Then I removed the paracord and melted off the excess after pulling the knot extremely tight. Then I rethreaded the loop of paracord sheath through the compass. The way I did this was by inserting a bite down through both of the compass’ metal watchband slots, but before threading the second slot, I twisted the loop of paracord sheath 180°. It’s a little tricky to get the size of the loop perfect, and after I had tighted the square knot and melted the excess paracord, I realized that my perfect length of loop had stretched due to the extreme tension I had applied in tightening down the square knot. But originally when I tied the knot, I had not used the 180° twist, which leaves an X of paracord directly underneath the compass.So upon final installation of my modified attachment loop, adding that half twist took out just enough of the slack I had added when I tightened the knot that I was able to thread the 22mm NATO strap through both bites and underneath the X. This left me with an extremely firm and low-profile attachment to the watchband, which is almost imperceptible unless you are looking quite closely at it.The tritium glow is superb. The accuracy is unparalleled in other watchband compasses. Cammenga is a great brand and I fully expect this thing to reside on my arm for many years —at least until the tritium decays and ceases to glow brightly enough. 3H has a halflife of about 12 years, so it’ll still be glowing faintly in 20 years I think. Maybe in 30 years it will be so faint as to require replacement. I fully expect this compass to last longer than that given the durability of its construction. I like it so much I added a 25mm round adhesive film watch protector to ensure I don’t scratch up the glass.Super happy with this purchase!

Arrived with a scratch on the face. Not enough fluid inside to keep the dial rotating andit kept clicking. Wrist band was great but this should have been priced around $5.When I went to return it, it would not let me do so through Amazon. I am now waiting tosee how I can get a refund because this is very cheap.

It’s a simple compass with tritium illuminated markings. Compass works as it should. After two uses one of the metal tabs that hold on the nylon strap broke. Just cheap materials. I made a paracord wrap and converted it into a keychain with the remaining tab so it’s more of a fob now. Other than a cheap wrist strap and weak tabs, it does what a compass needs to do. I attempted to return it after the tab broke but because it’s got tritium in it, you will be unable to return it. Seller will not budge on this so if it happens to you, you will have to eat the cost and make it work.

Oh, my. For wrist band compasses, this one is the best. If for nothing else, the tritium. So, I read the reviews that expressed disappointment that this compass was not liquid-filled. I also wanted liquid-filled. So, guess what? I filled it myself; yes, I did. Made a tiny hole in the very edge of the plastic crystal with a red-hot sewing needle. Used a medical syringe to inject olive oil all the way full. Wanted to use glycerin, but didn't have any handy. Then I protected all but the tiny hole with aluminum tape. Set a plastic knife on fire and dripped melted plastic onto the hole. It worked. Looks like an aircraft compass now, and -- when you let it settle down -- points north. It's a beautiful thing. Yes, you may try all this at home. I was ready to buy a second one, if I messed this one up, but it worked first time. Does not leak or seep oil. The needle floats slow and steady, like a ship's compass.Next issue is that it won't mount on my 22mm NATO band, because it is made for about an 18mm band. I am pretty sure I will figure out a professional-looking solution for this, too, eventually. Gears are turning; not worried.... yet.I am extremely happy with this wristband compass. If you require rotating bezel and azimuth figures, etc., this obviously doesn't have that. But the case is entirely metallic, other than the crystal. But to me (and you, too, I would think), the tritium illumination trumps everything. Can't believe this cost so little with three tritium vials (the 2-part reference line on the crystal, and one along the North). Dreamy.As with ANY magnetic compass, to take an accurate reading, you only have to hold it level, and away from ferrous materials or any other interfering magnetism.