The RS100 is a simple, no-fuss solution that's perfect for entry level runners who want to get on the right track to fitness. It comes with a variety of uncomplicated yet highly effective features. Heart Rate features include OwnCode, OwnCal, OwnZone, average heart rate and maximum heart rate. Data features include 1 exercise file and data transfer.
Price:$51.12

Polar chest strap and transmitters sold as a set. Coded transmitter works with current models except CS600 and RS800 but only eliminates interference (cross-talk) when used with a coded wrist or head unit. User replaceable battery. Antibacterial fabric. Easy-to-use side opening hook. Front transmitter connection. Fits 27-Inch to 60-Inch.
Price:$54.95

Polar Chest Strap and Transmitters sold as a set.Functions with both coded and non-coded wrist and head unitsWorks with current models except the CS600 and RS800 but does not eliminate interference (cross-talk) from other unitsIncludes sealed transmitter and elastic strap (M)
Price:$35.50