Features a dot matrix display and quick start function. No manuals required, just enter age and start exercising. Displays Heart Rate/Time of day simultaneously. TIME/CALENDAR/ALARM Displayed in hours/minutes/seconds. Day of week, month and date. Hourly Alarm/Daily Alarm. Ideal for taking resting or exercise heart rate without transmitter. Setting of three target zones from age or maximum heart rate. One manually set zone all with hi and lo audible and visible alarms. Displays elapsed stopwatch time, heart rate, % of maximum heart rate and active zone simultaneously Stopwatch holds 50 lap (with average HR for lap) and split times (with HR at the instant of key press) when heart rate enabled. To 10 hours, with recall for all four zones of: 1) Time in, above and below 2) Average heart rate 3) Percentage of total session time. Key press starts an automatic scan through: -Exercise time (in hours/minutes/seconds) -Maximum heart rate -Average heart rate -Minimum heart rate Information can be stored in memory and can be recalled or reset during and after the exercise session.