Product Summary The Wireless Exercise Heart Rate Sensor has a chest strap and will transmit data wirelessly up to 10 m away! The electrode belt fits around the ribcage (worn against the skin for best results, but can be worn over a shirt if a drop of saline solution is applied under the electrodes). Data wirelessly transmits the cardiac signal to the sensor. Educational Use Only This is not a medical device. PASCO products are designed for educational use only and should not be used in any apparatus involved with life support, medical testing, patient diagnosis, or industrial control/testing systems. Applications Compare a student’s heart rate before, during, and after exercise Calculate recovery rate after physical activity Determine the effects of mild stimulants (e.g. caffeine) Investigate how heart rate changes when a student sits, reclines, stands or moves suddenly What's Included 1x Bluetooth® Heart Rate Module 1x Coin-cell battery 1x Chest strap (M-XXL)