... Qty: 4 pcs4.Surface treatment: electroplating5.Feature: temperature detectable6.Advantage: water saving, cleaning7.Lifetime: about 3 years 8.Certificate: CE, RoHS ... down, the LED will light instantly an automatically;A,When water temperature is ≤32°C,Green color will show automatically ; ... C-45°C,Red color will show automatically; D,When water temperature is above 46°C,Red color will flash immediately ...