Watch Maintenance Tips: 1. Please don't approach the watch and magnetic objects to each other; 2. In case of water inflow (with air), it shall be sent to the maintenance point for cleaning immediately to avoid the corrosion of the core; 3. If there are protective sheets or labels on the back of the surface, please remove them before use, otherwise sweat will penetrate into the backing paper, resulting in rust on the back of the surface; 4. Do not contact the watch with various solvents and chemicals, otherwise the watch case strap will change color and rust due to erosion; 5. Watch (only 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 electricity or shorten electricity Pool life. Do not put the watch in the low temperature - 10 ° C environment for a long time, because the air conditioner will slow down or speed up the time. When the watch returns to the normal temperature, the operation will recover Normal; 6. The watch can be divided into diving watch, waterproof watch and non waterproof watch according to the waterproof performance. Watch waterproof depends on the waterproof rubber ring at the glass, back cover, handle, etc Meeting the corresponding standards and divided into different levels: (1) sweat-resistant: very easy to understand, only to prevent sweat from running into the table; (2) general water-resistant: it doesn't matter if you encounter water occasionally, for example, if you water a flower and spray it on your hand carelessly, don't be nervous, It's OK to take it off and wipe it clean. In short, it's to prevent the accidental little water in life; (3) 30m waterproof (30m, 3atm, 3bar): the watch with the word "30m" on it is a waterproof watch, which can be used in daily washing or rain, but the main If in order to prevent the movement from being damaged by dust and moisture. 30 meters of water-proof, the professional explanation is that each square centimeter area can bear 3 kg of pressure, about static In this state, the pressure is equivalent to 30 meters of water depth, equivalent to 3 atmospheric pressures. For our ordinary consumers, we just need to remember that 30 meters is a waterproof meter The most basic is enough; (4) 50m waterproof (50m, 5atm, 5bar): the watch with the word "50m" on it, that is, 50m waterproof watch, is the real meaning in consumers' mind Waterproof watch, can be used for swimming and general household waterproof watch. Remember not to adjust the meter in water. (5) diving watch (100m waterproof, 200m waterproof, 300m waterproof, etc.): it is a professional waterproof watch, which can be used for swimming, diving and other underwater work.