Digital Performance System, Black Resin Strap, INDIGLO night-light, Water Resistant to 30m, 100 hour chronograph, Size: Large, Timer, Dual Time Zones. One-Year Warranty, Alarm Features, 50 lap recall, 2 Year Battery Life. GPS transceiver calculates speed and distance data, Transmits data to watch with synchronized Digital FM Signal, Includes strap to wear unit on the upper arm and belt clip, Automatically synchronizes time of day with GMT ensuring accuracy.