The RS400sd has all the same advanced running features as the RS400 but with a few extras. With the addition of the compatible foot pod which comfortably attaches to your running shoe laces, you can accurately and wirelessly measure speed, distance and pace, as well as the level of your performance.

• Measures your heart rate combined with running speed and distance
• Synchronizes with the Polar ProTrainer 5 software for guidance, analysis and creating individual training settings
• Determines if your training program and recovery time are optimally developing your performance
• Guides the intensity of your training by providing specific heart rate zones

• Heart rate (displayed as bpm)
• Heart rate (displayed as % of maximum heart rate)
• Automatic/Manual target zone (% / bpm / HRR%)
• Visual and audible alarm in target zones
• Water resistant - 50m
• Backlight
• HeartTouch™, button-free operation of wrist unit
• Easy start (setting wizard)
• Over-sized display
• User configurable displays - all lines
• KeyLock
• Event Countdown Timer
• Display zoom
• Graphical target zone indicator

• Transfer exercise data from wrist unit to polarpersonaltrainer.com via Polar WebLink (SonicLink/Infrared)
• Compatible with Polar ProTrainer 5™ software

• Bike mount - opt.

• IrDA USB 2.0 Adapter or internal/external non-Polar IrDA adapter

• Display text in English, German, French and Spanish

• Wireless ECG accurate heart rate
• Polar sport zones
• Polar OwnZone®
• Polar OwnCal®
• Polar Fitness Test™ with OwnIndex®
• Polar OwnCode® (5kHz)
• HR-based target zones with visual alarm - 3
• HR-based target zones with audible alarm - 3
• Exercise Set (extended exercise profiles)
• HRmax (Polar Fitness test-based)
• HRmax (age-based)
• Interval timers
• Maximum heart rate of total exercise
• Average heart rate of total exercise
• Minimum heart rate of total exercise
• Average heart rate of each lap
• Maximum heart rate of each lap
• Number of laps - 99
• Automatic lap recording
• Exercise Date
• Interval trainer (HR, pace, distance) guided workouts
• ZonePointer
• ZoneLock

• Number of exercise files (with summaries) - 99
• Exercise file info page with date and time
• Exercise Time (total)
• Time in target zone
• Target zone limits
• Average heart rate
• Maximum heart rate
• Last OwnIndex
• Calorie expenditure (Exercise/Weekly/Total/Fat%) - exe.total
• Recording rate - 1s,5s,15s,60s
• Memory left indication
• Lap info
• Distance (total) - opt. with Speed sensor

• Speed/Pace and Distance
• Speed displayed in pace, or kmph/mph
• Running Index
• Shoe selection
• Target pace
• Target pace alarms
• Trip Odometer
• Run Distance
• Time and Distanced based interval timer
• Totals mileage, kilocalories, time training
• Distance summaries
• Speed/Pace summaries
• Speed/Pace target zones
• Speed/Pace lock
• S1 foot pod™

• T31 coded™ transmitter - compatible
• WearLink® 31 coded transmitter (changeable battery) - compatible
• WearLink® + 31 coded transmitter (changeable battery)

• Time of day (12/24h) with alarm
• Dual time zone
• Date and weekday indicator
• StopWatch
• Low battery indicator
• Alarm with snooze
• Reminders (visual/alarm)
• User replaceable battery