• Easy to program heartrate monitor.
• Wrist watch band: ventilated for wrist comfort.
• Backlit wireless heart rate monitor: view in dim light.
• Heart rate alarm option: Set for low and high heart rates.
• Treadmill or bicycle mounting bracket: Mount watch receiver to most treadmills and bicycles. Use as a cycling heart rate monitor.
• Built In Heart Rate Monitor Watch: Time of day display and daily reminder alarm feature.
• Heartrate Monitor Contains: 1 wrist receiver monitor, 1 transmitter, 1 transmitter heart rate monitor strap, soft zippered storage case, 2 lithium batteries (installed) and instruction manual.
• Water resistant sport heart rate monitor: wear watch and chest transmitter belt as deep as 98 feet (30 meters) below water surface. Or use while bicycling, running, etc.
• Note: Wrist heart rate monitor functions only when transmitter chest band is not submerged in water. Stand up out of water to get heart rate.
• Manufacturer's Limited Warranty: 1 year.

1. Exercising in your "zone" provides optimum fat burn and weight loss.
2. High and low alert keeps you in your "zone" during workout.
3. Helps you avoid muscle strain from working out too hard.

A heart rate monitor is a device that allows a user to monitor their heart rate while exercising. It usually consists of two elements: a chest strap transmitter and a wrist receiver (which usually doubles as a watch). Strapless heart rate monitors are available as well, but lack some of the functionality of the original design. Advanced models additionally measure heart rate variability to assess a user's fitness.

The heart rate monitor was invented by the Australian physicist, Robert Treffene. He appeared on the television show The New Inventors with his device, which was made with swimmers in mind.

The first EKG accurate wireless heart rate monitor was invented by Polar Electro Oy in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of "intensity training" by heart rate swept the athletic world in the eighties. By the 1990's individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people.

The chest strap has electrodes in contact with the skin to monitor the electrical voltages in the heart (see electrocardiography for more details). When a heart beat is detected a radio signal is sent out which the receiver uses to determine the current heart rate. More expensive monitors send a unique coded signal from the chest strap, and this prevents a user's wrist receiver from receiving signals from other nearby transmitters. This is known as cross-talk.