This is a single set of Polar heart rate monitor. The set includes one heart rate transmitter, one watch, and one chest strip. Both transmitters and watches are tested and working. Specific models and conditions are listed below:
Transmitter: Polar T31-coded, used.
Watch: E600, used. Comes with new battery. Watch is in good condition. The belt keeper has aged and might fracture (some of the keepers are already gone), but this doesn't affect the usage.
Chest strip: compatible with sensor, brand new.
Follow the instructions of Polar T31 transmitter and E600 for usage.