led shower head for best price with ce and rohs certifications 1,No battery needed, the built-in device can generate electricity without any other power connecting to the water. 2,The water pressureshould beabout 0.1 0.6Mpa. 3,Two varieties of outflow of the water can be available, one is inner-ring cross and the other is outer-ring diffusion. 4,When the water flows down, the led light will emit instantly and automatically,and the light color will change by detecting the water temperature. 5,When water temperature is below 32oC,the green color will show automatically. 6,When water temperature is between 33oC and 41oC,the blue color will show automatically. 7,When water temperature is between 42oC and 45oC,the red color will show automatically, and when water temperature is above 46oC, the red color will flash. 8,It is bright enoughso that there is no needwithany other lighting fixtures, andwarns you the water temperature in advance. 9,The blue and green color can swap according to the customers' demand. casing materialABS Plasticled qty8pcsled light colortemperature controlledsurface treatmentelectroplatedcasing colormetalicmaximum size250*50*112(Dia)mmweight0.23KGcertificationsCE+ROHSregular working water pressure0.1-0.6MPaProduction standardEU EN1112