The Timex T5K211F5 heart rate monitor shows your heart rate while you work out. You have the option of lap and split in the 100-hour chronograph of this Timex heart rate monitor to have a look at your workout sessions. Boasting an INDIGLO night-light with NIGHT-MODE feature, this Timex wrist watch offers easy readability even in low-light situations. This Timex heart rate monitor is light in weight and has an adjustable strap that fits your wrist perfectly. The 50-lap memory with average heart rate per lap of this Timex wrist watch lets you analyze your past records anytime. The 100-hour, 20-mode countdown timer of the Timex T5K211F5 heart rate monitor accurately tracks your performance during activities like racing, sprinting or swimming.