fits wrist size
5" to 7"

fits wrist size
5" to 7"

How to measure for the correct Transmitter Size:
BECAUSE ONE SIZE DOES NOT FIT ALL
The measurement for the transmitter should be taken right below the pectoral muscles or breasts. If you are on the borderline of the sizes, we recommend going up to the next size. The measurements are calculated in inches, and the straps are elastic so sizes can vary based on personal comfort level. If you order the wrong size, you can exchange just the elastic strap portion only, or order a replacement elastic strap located under transmitters.

If this product contains a T31 non-coded Chest Transmitter It is a new ergonomic design that is 25% smaller. Smaller means increased comfort. A flexible rubber transmitter with manufacturer changable batteries. A good transmitter for swimmers.

If this product contains the T31 coded Chest Transmitter A flexible rubber transmitter with manufacturer changable batteries. A good transmitter for swimmers.

If this product contains a Wearlink Chest Transmitter It takes comfort and function to another level, the new Polar WearLink™ is the first soft transmitter belt ever produced. The transmitter’s textile strap is removable and machine washable. Replaceable fabric strap (Life of strap - 100 machine washings) The WearLink transmitter has a changeable battery and it delivers up to two years of use exercising 10 hours a week. Water resistant up to 30 meters and it is ECG accurate.

Polar Coded Versus Non-Coded Transmitters:
* Coded Transmission will greatly reduce cross talk (interference) from other heart rate monitor users with 3 feet of you.
* Coded Transmitters will work with Gym equipment that is Heart Rate Monitor Ready, but the transmission will not be coded.
* Coded Frequency will not eliminate (but can reduce) interference from other wireless disruptions like high tension wires, computers, wireless cycling systems, etc.

While you can upgrade your transmitter strap for comfort, the Wearlink or T31 transmitter will only offer a non-coded frequency to a non coded wrist receiver. Timex and some Oregon Scientific offer Digital FM Frequency, which eliminates the cross talk and interference of Analog Frequencies.