SKY Bathroom thermostatic shower system is equipped with a safety lock at 38°C to protect children and the elderly against scalding-hot water, enjoy a more comfortable shower. The thermostatic valve will automatically balance the cold and hot water pressure in short time to maintain water temperature stable. (Note: As every tap has a strict quality check, it is normal there is a little water in some taps when you received.) 10-year guarantee and refund within 30 days. For any question, please contact us.