Know the time and give your brain a workout with the Ultmost WA-142A Binary Watch in white oval. This watch features a binary representation of the time. In order to get the correct time, you have to add all of the lit numbers in the hours row together, and add all of the lit numbers in the minutes row together. The hours row features the numbers 8, 4, 2, and 1, and the minutes row features the numbers 32, 16, 8, 4, 2, and 1.