A wristband to monitor your exposure to sunlight

A new wristband that tells users when they have had a healthy dose of sunlight has been developed in the US.

A new wristband that tells users when they have had a healthy dose of sunlight has been developed in the US. While exposure to sunlight provides vitamin D, a lack of protection from harmful ultraviolet (UV) rays can lead to skin cancer.

It is the world's first true gadget for daily UV activity monitoring , its makers say. The waterproof wristband contains patented, NASA-inspired UV sensors with LED indicators that light up as UV exposure accumulates, before flashing once the safe limit has been reached, it was reported.

The user sets the device to their skin tone and sensitivity and it then constantly measures both direct and reflected UV exposure.