1. Water-touch switch, energy-saving & environment- protected. 
2. Temperature detect switch for different color.
    below 31 degree: blue color. 
    31 to 43 degree: green lights on.  
    43 to 50 degree: red lights on. 
    over 50 degree: the red lights flash frequency
3. Low input voltage: 6V. Safe and reliable. 
4. LED driven by battery,and the battery span-life is about three
    months, it is easily to change them when they are empty.
5. Certificate: CE approved