Take a step back to 1976 with a timepiece that pays homage to the worldƒ??s first multifunctional digital clock, the Casio CQ-1.The revolutionary CQ-1 ƒ?? a clock, alarm, stopwatch and calculator all in one ƒ?? solicited so much affection.Casio now revives this ƒ??70s design in timepiece form, bringing the original CQ-1 color schemes to a trio of iconic CA-500 models equipped with eight-digit calculator function. Vintage ƒ??70s flair meets contemporary style for a timepiece as eye-catching as it is nostalgic. CQ-1A popular, personal-sized digital clock with innovative functionality. Designed to accommodate peopleƒ??s daily schedules from the moment they got up in the morning, the CQ-1 featured a unique combination of four functions: time display (clock); time memory (alarm); time measurement (stopwatch); and time calculation (calculator). This memorable product served as the launching pad for the development of subsequent Casio combined-function innovations. Case / bezel material: Resin / Chrome plated Stainless Steel Band Adjustable Clasp Resin Glass Water Resistant Dual time 8-digit calculator 1/100-second stopwatchMeasuring capacity: 23:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place times Daily alarm Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, am/pm, year, month, date, day Accuracy: ¶ñ30 seconds per month Approx. battery life: 5 years on CR2016 Size of case : 43.2 Ç? 34.4 Ç? 8.2 mm Total weight : 53 g