Designed for recreational athletes who want advanced features to guide training and assess the effectiveness of each workout. Cycling functions include Current, Average and Max Speed. Heart rate functions are Average Heart rate, Max and % of Max Heart Rate and Recovery Heart Rate. The S150 has three target zones with audible and visual alarms, count up/down timers, 50 lap splits that display exercise time, lap time, heart rate and average heart rate. Full function watch with alarm, 2 time zones and calendar with weekday indicator.