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What does 5 ATM Water Resistant mean?

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It is a way of telling you the watch can resist getting wet inside, to a point. The normal atmospheric pressure at sea level is 1 ATM (short for Atmosphere) or 1 bar. read more

5 ATM Water Resistant means the product will resist water getting inside until the pressure of the water is 5 Atm. 1 Atm is the standard pressure of the atmosphere at sea level. In water, that is about 50 meters deep (165ft). read more

The following are “real world” examples of the water resistance of each rating: 3ATM - Water resistant to 30 meters (100 feet). Will withstand splashes of water or rain but should not be worn while swimming or diving. 5ATM - Water tested to 50 meters (165 feet). Suitable for showering or swimming in shallow water. read more

While the confusing world of “waterproof” gadgets is a relatively new one, ATM ratings have been misunderstood for ages because of confusion over what exactly the rating indicates. On the back of watches and fitness devices you will often seen a notation like “5 ATM” or “Water-Resistant to 50 Meters”. read more

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