Use it for runs and workouts on the go, or sync it to the iFIT app or your machine to use with ActivePulse™, iFIT’s patented feature that uses your heart rate to automatically adjust your workouts based on your target heart rate zoneAdjustable, non-slip band allows you to wear the monitor on your forearm or upper armDisplay: Optical PPG Heart Rate Sensing TechnologyEntertainment: Bluetooth and ANT+ dual band technology connects to trainning apps and fitness devicesPulse: Includes a one size fits all adjustable non-slip arm bandOther: On/Off button with LED indicator light / to be worn on the forearm or upperarmPower: Rechargeable lithium-ion battery with magnetic charging cablePower Supply: 30 hours of battery life between chargingWarranty: 1 year warranty