Sumui moon bracelet white the binary watch is a perfect accessory for the technology conscious or for the fashion trendy hipster made of high quality stainless steel and quality leather band these watches feel and look incredible the watch displays time in binary format it uses led lights to indicate hours and minutes led on means 1 led off means 0 first row denotes the hours and second row indicates the minutes translation of time from binary to decimal is easy add the numbers of lit