Xiaomi *IP54 dust and water resistance test. The product has passed the GB/T4208-2017 coating protection classification (IP code) test conducted by Guangdong KEYS Testing Technology Co., Ltd. The IP54 test report numbers are KEYS24031555004IP-01 and KEYS24031555003IP-01. The test results show that the product complies with the GB/T4208-2017 standard. The IP54 rating applies to the headphones, not the charging case. Do not use the headphones near hot water. The headphones cannot be used in the bath or shower. Avoid using the headphones during high-intensity exercise, as sweat may damage the device. This product is splash, water, and dust resistant at the time of purchase. However, these properties are not permanent and may deteriorate with daily use. The warranty does not cover damage to the device caused by immersion in liquids. In-Ear Bluetooth Headset