The Armitron WR165 watch is not waterproof. It is water-resistant and has a depth rating of up to 165 feet, 5 ATM or 50 meters.
Watches that are labeled as "water-resistant" either do not include a depth rating, meaning that the watch is only meant to withstand accidental splashes of water that can immediately be dried, or they include a rating that determines the different usages the watch can withstand before it becomes damaged. The Armitron WR165 has a depth rating of 165 feet, meaning that it can be worn around household sinks, while playing sports and also while swimming in shallow waters. It should not be worn while bathing, snorkelling or scuba diving.