Considered a breakthrough in human interface design, the IndePad™ transmitter provides smooth and constant contact with the skin, which enables accurate reading during the most rigorous activity. Regarded as the integral component of each Sports Instruments heart rate monitor, the conductive rubber pads of the IndePad transmitter move independently of the main transmitter’s housing, assuring constant contact with the skin for superior comfort and reliable, accurate readings. Best of all, the transmitter battery is user replaceable, ensuring continued use for years to come.