Get a quality workout with the Garmin heart rate monitor. When worn around your chest during an activity， it wirelessly transmits your heart rate to your compatible device for instant feedback on how hard you?re working.The front part of the strap contains the heart rate module and is made of flexible plastic. The part of the strap that goes around your back is made of a soft fabric and is adjustable to your size.Use and care of the heart rate monitor is a snap. Once it's paired with your compatible device the first time， it will automatically recognise it each time. The fabric of the strap can be removed and hand-washed as often as needed.This heart rate strap has an IPX7 waterprof rating and should not be worn while swimming.This Garmin heart rate monitor is compatible with a number of Garmin fitness products including Ant+ Adapter for iPhone， D2， Dakota 20， Colorado 300， Edge 305， Edge 500， Edge 510， Edge 705， Edge 800， Edge 810， Edge Touring Plus， eTrex 30， Fenix， Fenix 2， Forerunner 110， Forerunner 210， Forerunner 220， Forerunner 305， Forerunner 310XT， Forerunner 405， Forerunner 405CX， Forerunner 410， Forerunner 610， Forerunner 620， Forerunner 910XT， FR60， FR70， Foretrex 401， GPSMAP 62S， GPSMAP 62SC， GPSMAP 62ST， GPSMAP 62STC， GPSMAP 64S， GPSMAP 64ST， GPSMAP 78S， Montana 600， Montana 650， Montana 650T， Monterra， Oregon 300， Oregon 400T， Oregon 450， Oregon 450T， Oregon 550， Oregon 550T， Oregon 600， Oregon 600T， Oregon 650， Oregon 650T， Quatix， and Tactix， D2， Garmin Fit， Virb Elite and Vivofit.