The 30/30 Interval Training® Heart Rate Monitor provides and tracks 30 second workout intervals. It is the first STRAPLESS heart rate monitor that continuously displays heart rate. SCIFIT fitness equipment also has a 30/30 interval training program called Heart Fit within the Intelli-Fit™ console. To learn more about the SCIFIT Heart Fit Program please visit http://www.SCIFIT.com/intelli-fit_console.shtml To learn more about 30/30 Interval Training please visit www.3030internvaltraining.com Please note that a flat shipping rate applies to this product of $8.90 to ship 1 to 2 monitors. To ship more than 2 please contact SCIFIT, 1.800.852.6869 x 231, before placing your order.