Casio, a globally popular watchmaker known for brands like "G-SHOCK," "Baby-G," and "BASIC," has created many original "world-first watches." Through its continuously challenging development philosophy, Casio continues to create new value in watches. AQ-S810W-3A Features Movement | Solar Analog-Digital Water Resistance | 10-bar water resistance Calendar | Full Auto Calendar Stopwatch | 1/100 second, 60-minute counter, with split Timer | Up to 2 sets of time can be specified Alarm | 5 time alarms | Hourly time signal World Time | 48 cities worldwide Illumination | LED light Size Body Size | Vertical x Horizontal x Thickness: Approximately 52 x 46.5 x 13.5mm Weight | Approximately 40g Band Size | Minimum ~ Maximum: Approximately 14 ~ 21cm Materials Case Material | Urethane Resin Case Back | Screw-down Dial Color | Black Band Material | Urethane Resin Band Color | Navy Clasp | Band hole fixed type