13. Is the JT7's diaphragm waterproof? Will it get damaged easily in humid weather?

The JT7 has passed FIIO's laboratory reliability tests, including but not limited to high temperature, high humidity, low temperature, and high/low temperature shock tests that exceed typical daily usage conditions. All data and listening performance remain within standard ranges, so you can use it with confidence. To extend product lifespan, please store it properly in a carrying pouch when not in use for a long time.