A very sensitive SMA spring in the thermostatic shower faucet is applied with its unique material will automatically adjust the proportion between inlet cold/hot water and maintain the constant outlet water temperature. Technical Data: 1.Working pressure: 0.1-1MPa (A protection valve shall be applied if the pressure of water supply exceeds 0.5 MPa). 2.Inlet water temperature range: Cold water:4-29 . Hot water; 55-85(A temperature range from 55-70 is recommended) 3.Outlet water temperature range:20-49 4.Set up temperature: When the temperature of outlet water is set at 38 and the temperature or pressure ofthe inlet cold/hot water changes in a certain range, the temperature of outletwater will be maintained at 38±2(or 40±2) 5.Safety: In case the cold water supply falls suddenly, the faucet will shut off the outlet water in the shower head immediately and completely. 6.Standards: EN1111, QB2806 or other equivalent standards are observed.