Prevent exposing your watch to shock or impact. Although all of our watches are tested for impact resistance, you should still avoid violent shocks to your watch. Apart from damaging its appearance, this can cause premature wear in materials and components, which may affect the performance of the watch. You should also prevent exposing your watch to magnetic fields. Avoid leaving your watch close to equipment that can produce strong magnetic fields such as speakers, refrigerators, mobile phones, or magnets as these may affect the performance of your watch. A magnetized movement will cause your watch to run erratically fast or slow.