Daily watch maintenance and watch knowledge: 1. Please do not bring the watch and magnetic objects close to each other; 2. in case of water ingress (with air) should be sent to the maintenance point immediately to avoid corrosion of the movement; 3. If the back of the watch is provided with protective sheets or stickers, please remove them before use, otherwise the sweat will penetrate into the backing paper, causing the back of the watch to rust; 4. Do not touch the watch with various solvents and various types of chemicals. Otherwise, the watch case and the like may be discolored and rusted due to erosion; 5. The watch (only for quartz watch) can operate stably and accurately in the range of 5°C～35°C at normal temperature. If the temperature exceeds 50°C, the battery will leak or shorten the battery Pool life. Do not leave the watch in a low temperature -10 °C environment for a long time, because the air conditioner will cause the time to slow down or go faster. When the watch returns to normal temperature, run the reply normal; 7. watches can be divided into diving watches, waterproof watches and non-waterproof watches according to waterproof performance. Waterproof watch is waterproof rubber ring that depends on the watch glass, back cover, crown, etc. Meet the corresponding standards and divide them into different levels: 1. SWEAT-RESISTANT: It is very easy to understand, just to prevent sweat from running into the watch; 2. WATER-RESISTANT: It doesn't matter if you occasionally touch the water. For example, if you water the flowers and accidentally spray it on your hands, don't be nervous, pick it up and wipe it clean. No problem. In short, it is to prevent life. Occasional small water splash; 3.30 meters waterproof (30M, 3ATM, 3BAR): There is a watch with the word "30M" on the watch. This is a waterproof watch. It can be used for daily grooming or rain, but mainly to prevent the movement from being damaged by dust and moisture. 30 Meter waterproof, the professional's explanation is that the area per square centimeter can withstand 3 kg of pressure, about 30 meters of water pressure at rest, equivalent to 3 atmosphere pressure. For our average consumer, we only Remember 30m, it is the most basic primary of the waterproof watch; 4. 50 meters waterproof (50M, 5ATM, 5BAR): the watch with the word "50M" on the watch, that is, the 50m waterproof watch, is the true meaning of the consumer's mind. Waterproof watch, can be used for swimming and general housekeeping waterproof watches. Remember not to adjust the crown in the water; 5. Diving watch (100m waterproof, 200m waterproof, 300m waterproof, etc.): It is a professional waterproof watch that can be used for underwater work such as swimming and diving. Reminder: 1. Any waterproof watch should not be exposed to hot water or water vapor (such as hot water bath, sauna, etc.); 2. Try to avoid using it in an environment with a large temperature change. The temperature difference will cause the moisture in the air in the watch to condense, causing water ingress and water mist in the watch. If there is fog in the watch, please go to the professional watch repair department for cleaning and maintenance as soon as possible; 3. the watch is a precision instrument after all, please take good care of it. Good use habits can increase the life of your love watch, and bad habits will shorten the life of your love watch.