(1) Water-resistant up to 50 meters per ISO standard 22810:2010. Not intended for scuba diving. Avoid excessive, sudden temperature changes and high-velocity activities. Rinse in fresh water/dry after use in sea water. (2) This device and related software are not intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease. The accuracy of the information and data provided by this device and its related software, including heart rate readings, may be affected by factors such as environmental conditions, skin condition, specific activity performed while wearing the device, settings of the device, user configuration/user provided information, placement of the sensor on the wrist, and other end-user interactions. Please refer to the user manual for more information on proper wear.