Dial diameter: 4.2cm
Specification: 2.0cm*23.0cm strap
Hand circumference: 14.0cm-19.5cm
There is a button on the right of the watch, and the light is on, and it is beginning to turn from 7 colors to flash, flash to flash. The light will last about 15 seconds. The colour of the light orange / yellow / Blue / red / Blue / Purple / green.