Soft Strap with Electrodes for EdgeA(R), ForerunnerA(R), vivofitA(R) & vivosmartA(R) - BlackElastic strap with electrodes for your premium heart rate monitor. Compatible Devices:EdgeA(R) SeriesForerunnerA(R) SeriesvivofitA(R)vivosmartA(R)WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.