Polar M400 GPS Watch

<b>A stylish GPS training companion with 24/7 activity tracking</b><br><br><b>Sports Watch with GPS.</b><br><br> For runners who want a sporty design with advanced GPS and training features, along with loads of options to keep an eye on their activity.

Key Features and Benefits:

• User-definable heart rate zone limits
  There are three ways you can set zone limits: as default heart zones that are automatically calculated based on your max HR; as free heart rate zones for which you can set the limits yourself; or as heart rate zones based on thresholds which you can define yourself.
• HRmax (age-based)
  The highest number of heart beats per minute (bpm) during maximum physical exertion. For a rough estimate of your maximum heart rate, subtract your age from 220. HRmax is a useful tool for determining the intensity of training as intensity zones can be defined using HRmax. Some Polar products define maximum heart rate during the Polar Fitness Test, see also HRmax (Polar Fitness Test -based).
• Polar fitness test
  Polar Fitness Test measures your aerobic fitness at rest in just five minutes. The result, Polar OwnIndex, evaluates your maximal oxygen uptake (VO2max). With the Polar Fitness Test you can measure your aerobic fitness by yourself, automatically and without any exertion. All you need is your training computer. The Polar Fitness Test is as accurate in predicting the VO2max as any sub maximal fitness test. The test is based on heart rate and heart rate variability at rest and personal information.
• Polar OwnCal - smart calories
  The most accurate calorie counter on the market calculates the number of calories burned. Calculation is based on your individual data: your weight, height, age, gender and the intensity of physical activity. Smart Calories are available in heart rate monitors and activity trackers.
• HR-based target zones with visual and audible alarm
  You can define your target zones for a training session based on heart rate to help define the right intensity. When you are out of the preset zones, the training computer will give a visual and audible alarm.
• Automatic age-based target zone - bpm/%
  To help you train safely and effectively, the training computer determines your heart rate target zone limits automatically according to your age-based maximum heart rate (220 minus age). The limits are determined either in beats per minute (bpm), as a percentage (%) of your maximum heart rate, or as a heart rate reserve (% HRR). See also Maximal oxygen uptake (VO2max) and Manual target zone.
• Heart rate - bpm/%
  Heart rate is the measurement of the work your heart does. Heart rate can be expressed as the number of beats per minute or as percentage of your maximum heart rate. Heart rate can also be expressed as a percentage of your heart rate reserve, meaning the difference between your resting heart rate and maximum heart rate (HRR = HRmax - HRrest). In Polar software or during strength training, heart rate can be displayed as a graphical trend.
• Heart rate zones
  Heart rate zones provide an easy way to select and monitor the intensity of your training and to follow heart rate based training programs. The default heart rate zones are divided into five zones based on the percentage of your maximum heart rate: very light (50-60 % HRmax), light (60-70 % HRmax), moderate (70-80 % HRmax), hard (80-90 % HRmax) and maximum (90-100 % HRmax). You can also define the zones as you want.
• Training benefit
  Motivating feedback that's delivered straight to you immediately after exercise is something that can help all of us. So if you want to know the effect of different training sessions, this feature will tell you exactly what you need to know. You get a quick overview after each session, and for more detailed feedback, you can either check your training file or get further in-depth analysis at Polar web services.
• 24/7 activity tracking
  24/7 activity tracking registers your daily activity at different intensity levels continuously for 24 hours a day, seven days a week. Counts daily calories and steps.
• Activity goal
  Get your daily activity goal and guidance on how to reach it. Activity Goal is based on your personal data and choice of activity level. The activity goal bar on your device fills up during the day based on your activity. With practical guidance like 'walk for 50 minutes or jog for 20 minutes' you can choose how to reach your daily activity goal. Meet your goal faster with more intense activities or stay active at a moderate pace throughout the day. You can find more tips on how to reach your activity goal from Polar Flow mobile app and web service.
• Steps and distance
  Counts steps taken during the day. The number of steps is estimated based on the frequency, intensity and regularity of your wrist movements. Polar Flow mobile app also shows distance based on the steps you have taken.
• Active time
  Active Time tells you the cumulative time at low, medium and high activity intensity. In Polar Flow mobile app and web service you can also see time spent in different activity intensity levels.
• Personal best
  Tracks your personal bests and notifies you when you have broken your record.
• Audio alerts
  During training, you are notified with a sound, for example when you need to slow down or to speed up to make sure your training goes as planned.
• Interval trainer guided workouts - heart rate/distance
  Create interval workouts based on time, heart rate or distance and get guidance during training.
• Advanced training analyzing
  You can easily analyze every detail of your training and get a deeper insight into your activities with plenty of possibilities to learn from what you do.
• Sleep duration and quality
  Starts tracking your sleep time automatically when you lie down and your body movements slow. The Polar Flow mobile app and web service tell you how much you slept in total and how restful your sleep was. By showing you the amount of restful versus restless sleep, it gives you a detailed look into how you sleep at night so you can see if it's affected by any changes in your daily life.
• Training targets
  Create detailed training targets in the Polar Flow web service and sync them to your device. During training you can easily follow the guidance on your device.
• Back to start
  Directs you to your starting point in the shortest distance possible, as well as shows the distance to your starting point. Now you can check out more adventurous routes and explore them safely, knowing that you're only a touch of a button away from seeing the direction to where you started.
• Training diary
  Stores up to 30 h of training time (may vary depending on your language settings). You can see your training history from the past four weeks and what you have planned for four weeks ahead.
• Sleep duration and quality
  Starts tracking your sleep time automatically when you lie down and your body movements slow. The Polar Flow mobile app and web service tell you how much you slept in total and how restful your sleep was. By showing you the amount of restful versus restless sleep, it gives you a detailed look into how you sleep at night so you can see if it's affected by any changes in your daily life.