Seiko svas003 swimming master stopwatch is a high precision, accurate, and reliable time tracker capable of achieving 1/100th of a second reading. The device can record up to ten hours with a maximum memory of about 300 lines. Single or dual memory option is available, split mode and it is water-resistant.
Pros
Great display
Easy to use
Very reliable and accurate
Water-resistant
Long battery life
Great for timing swimming lessons
Cons
Expensive