• Auto light switch, selectable illumination duration, afterglow
• World time
  29 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city / World time city swapping
• 1/1000-second stopwatch
  Measuring capacity: 99:59'59.999''
  Measuring modes: Elapsed time, lap time, split time
  Others: Speed (0 to 1998 units/hour), Distance input (0.0 to 99.9)
• Countdown timer
  Measuring unit: 1 second
  Countdown range: 24 hours
  Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
  Other: Auto-repeat
• 5 daily alarms (with 1 snooze alarm)
• Hourly time signal
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Regular timekeeping
  Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (speed)
  Digital: Hour, minute, second, pm, month, date, day
• Accuracy: ±15 seconds per month
• Approx. battery life: 2 years on CR1220