Specific:

 A,uv exposure is monitored bysimply weaing the band,it change color to reflect your levelof exposure to the sun;

 B,this solar watch,wristbands provide you with a simple sun-sensitive gauge through color change alerts you;

C,the central part is made in photosensitive material which changes its color depending on the intensity of the UV radiation transmitted by the sun;

D, does not show time,does not need batteries,unisex,is reusable,adjustable to all wrist sizes and waterproof;

E,  In order to know the UV index, will be enough if you compare the color that are in the central part of the quadrant with the 4 colors that are around. 

F, The 4 colors indicator go from clear to dark depending  on the  intensity of UV rays. 

 1)     Feeble intensity: UV index 1-2 ( protection  not necessary)  
 2)     Mid intensity: UV index 3-5 ( protection recommended : put a t-shirt, sun glasses, hat and sun protection )
 3)     High intensity: UV index 6-7 ( protection necessary: put a t-shirt, sun glasses, hat, sun lotion )
 4)     Very high / Extreme in intensity: UV index 8-9-10 / 11+ (avoid exposure outdoors)

Custom new mold with logo is available.