I’ve purchased these compasses before and have used them in my hollow handle survival knives. They’re the perfect size at 14mm, constructed of thick durable polycarbonate, they’re spot on with finding magnetic north, and are luminous. When charged, the lume is super bright for a while, but as with all lume will dim over the course of an hour. The final selling point for me is the amazing price. Product is as good as the expensive products at a lower price and more compact size.

One of the only button compasses out there that actually holds true to North. Will be putting one through the wash for an experiment.

One of the only button compasses out there that actually holds true to North. Will be putting one through the wash for an experiment.

I had been looking for a small compass for my Chris Reeves survival knife and this fits perfectly in it.

While standard button compass are 20mm, this 14mm gives you greater hideability. Basic 4 direction compass, and list most button compass you'll want to shake it gently several times to see which way it points north most often.

Tested on Dartmoor, England in late winter. Accurate. Smooth movement of compass card in fluid. No bubbles formed in the fluid, even in cold conditions. The luminous markers work well and gave a clear and unambiguous indication of direction in darkness. Overall, an excellent and inexpensive SERE compass.

You will be hard pressed to find one smaller and more accurate, tested in the jungles of south east asia against bigger suunto units and found superb.