SHIPPING INCLUDED The Cardiosport Fusion Line of Heart Rate Monitors has been specifically designed to eliminate any interference or crosstalk. These digitally coded units are popular in gyms where you are susceptible to interference from other heart rate monitors and motors from treadmills as well as ellipticals.Features: Ultra Light weight and contours to your body for a comfortable fit and feel Completly adjustable with a User Changeable Battery Comes standard with all Cardiosport heart rate monitors Lifetime warranty