B006CEM3LC Ultrak Seiko 300 Lap Memory Timer

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Dual memory mode (single memory function or block memory function)
Measurable up to 10 hours in 1/100 of a second; split/lap time measurement
Store and recall of up to 300 split/lap times; memory segregated by event
Measures strokes per minute for events such as swimming and rowing

Time and automatic calendar; battery life indicator; 10-bar water resistant