Mineral crystal This, very durable, mineral crystal has improved protection. Quartz Watch A battery-powered quartz watch is controlled by fluctuations in a crystal of the mineral quartz. These oscillations change very little over time, which is why quartz is often used - because it retains its accuracy. Water protection: 30 meters (3 bar) This watch can withstand rain/minor splashes, and cannot be used while swimming or showering. The value refers to the pressure in water, at that depth, while motionless... and should not be seen as the depth for wearing the watch.. Condensation - important! Rapid changes in temperature can cause condensation inside the watch. If you notice moisture beneath the glass, you should immediately go to a watchmaker, who can open and dry the watch. Even if the signs of moisture disappear, by themselves... the moisture will not - and will eventually damage your watch - so, visit a professional and remove it permanently. Even waterproof watches are not protected against condensation, so keep that in mind if you plan to go from very hot to very cold temperatures - like from a hot sauna directly to the snow. If condensation occurs, it very rarely (if ever) depends on manufacturing, so if your watch is damaged by moisture, the warranty will probably not cover it (it could be manufacturing issues, but... most likely it will be because of the rapid change of temperature = natural causes). Size This watch has a width of 40 mm (the dial, measured from left to right, with the crown excluded). Even if some watches are not perfectly circle shaped, we still use the term: diameter - and we only measure the case, completely ignoring the crown (even though some includes it, in their measurements). Case made of stainless steel. Sizes Does this watch fit your wrist? Wristwatches has gradually become larger in size, and a typical men's watch is usually between 40 and 45 mm wide. If you have a wrist that is noticeable larger/smaller, we recommend that you focus on the sizes in/outside the outer edges of the typical sizes. You are always welcome to contact our support, so we can share our experience with you. This product description is created specifically for Watchia.com and may not be copied (in whole or in parts)! Violation will therefore be met by demands of compensation