OpenRun Pro 2 has a waterproof specification of IP55 that can not be used in sea. It is not suitable for sauna and showering. While showering, water vapor can enter the internal components of the headphones through the seams, leading to water ingress. The recommended operating temperature for our headphones is between 0°C and 45°C. Using them in semi-enclosed, high-temperature environments like saunas could pose safety risks.