Casio W93H-1AV Black Casual Sports Watch - 50M Water Resistant 

Features: 

50 Meter Water Resistant 
Auto electro-luminescent backlight with afterglow 
Dual time 
1/100 second stopwatch 
Measuring capacity: 23:59'59.99” 
Measuring mode: elapsed time, Split time, 1st-2nd place times 
Countdown alarm 
Input range: 1 second to 24 hours 
Measuring unit: 1/10 second 
Auto-repeat fucntion, progress beeper function 
Hourly time signal 
Daily alarm 
12/24-hour formats 
Accuracy: +/-30 seconds per month 
Battery:Approx. 3 years on CR1616