51.0mm diameter Vibration Alarm Direct Countdown Timer Button High Luminance LED Shock Resistant Flash alert Flasher with buzzer that sounds for alarms, hourly time signal, countdown timer time-up alarm World Time 35 time zones (100 cities + UTC) 5 Daily or One-time Alarms Hourly Time Signal 1/100 second stopwatch Full Auto Calendar 12/24 Hour Formats Low Battery Warning Button operation tone on/off Water-resistant 200 meters Black resin band Neutral face