The maximum depth resistance under water is measured in "atmospheres" - (ATM) or "bar-tested" at the labs. One ATM corresponds to 10 metres of static water pressure.
A water-resistant watch can be exposed to light moisture, such as light splashes of water like when washing your hands**. However, some water-resistant watches can be submerged into water to the maximum depth resistance as and only when specifically indicated. Always remember that replica watches are not made to be used to the same extent as the genuine ones. A replica dive watch will not withstand the same water pressures as the genuine one it refers to, does.
** Please note that all replica watches indicated as water-resistant in their description can withstand light moisture only, accordingly to the above specification. We highly disclaim the use and wear of replica watches in water environments like seas, lakes, swimming pools, showers, hot tubs, saunas and generally in similar situations that involve the submersion of your replica watch in liquids, i.e. water, cold or hot. Not only water and humidity will damage the internals of your watch but also many chemicals that can be found in water: i.e. the salt in sea water or the chlorine found in swimming pools water. Said chemicals and also many more will harm your replica watches and as well genuine watches.
*** Unless indicated and specifically stated in the description of the replica watch of choice, your watch should never be submerged into water. All chronograph watches, even if stated as waterproofed from the factory, should never be submerged underwater nor should they be used underwater. The pusher construction that operates the chronograph mechanism will seep in moisture/water when operated underwater or even when the watch is in a humid condition i.e. under a rainshower. This is a general and very important guideline for the safety of all watches, replicas and genuines as well.
Never operate buttons, pushers, crowns, bezels when underwater and when the watch is wet.