UV rays from the sun enter through the window in the band and are channeled onto the
UV detector inside the casing. This detector monitors UVA and UVB, which are the sunʼs
rays that can burn you, and does not simply detect sunlight. A program in the memory chip
calculates when itʼs time to apply more sunscreen, based on a formula developed by a
leading dermatologist in the USA. Our formula complies with the guidelines from the World
Health Organisation and World Meteological Organisation for reapplication of sunscreen
and also allows for under-application of sunscreen. The UV detector feeds data
continuously to the on-board processor that activates a vibration motor to alert the wearer
at the right time.