To hold up in the field these developed by Cammenga are shockproof waterproof and sandproof – making them useful options in deserts and maritime operations. Safely use this Cammenga 27 Lensatic Directional Compass in temperatures ranging from -50 degrees F to 150 degrees F. Also the integrity of this device isn’t compromised by temperature changes thanks to its non-liquid filled needle housing. The Cammenga 27 Phosphorescent Lensatic Compass w/o Tritium is a fantastic navigation tool that brings tons of utility to the field without putting a massive dent in your wallet. Specifications for Cammenga 27 Phosphorescent Lensatic Compass without Tritium: Included Accessories: Pouch Fabric/Material: Aluminum Closed Length: 3.25 in Features of Cammenga 27 Phosphorescent Lensatic Compass without Tritium Shockproof damage-resistant design. Waterproof to considerable depths. Sandproof for extra durability. Accuracy +/- 40 mils. Performs flawlessly in temperatures ranging from -50 F to 150 F. Uncompromised by temperature changes due to its non-liquid filled needle housing. Uses a copper induction-damping ring that slows settles and steadies the compass needle quickly. Constructed with a powder-coated aluminum frame for optimal endurance. Please make sure to read the description of the individual item. For more please visit our store section.