Polar CS500 Cycling Computer LCD Display--Clear and easy to read display. Dual Line Display--Allows you to view two different readings at the same time. Target Zone : Automatic Age-Based Target Zone (BPM); HR-Based Target Zones with Visual and Audible Alarm; Manual Target Zone-- Target Zone Indicator --Indicates when you are above, below, or within your heart rate target range. Heart Rates--Records average and/or maximum heart rate for workout.