---
product_id: 1421304
title: "Polar RS300x SD Heart Rate Monitor"
brand: "polar"
price: "111 kr"
currency: DKK
in_stock: false
reviews_count: 7
url: https://www.desertcart.dk/products/1421304-polar-rs300x-sd-heart-rate-monitor
store_origin: DK
region: Denmark
---

# Compact Size Calorie Tracking Quartz Movement Polar RS300x SD Heart Rate Monitor

**Brand:** polar
**Price:** 111 kr
**Availability:** ❌ Out of Stock

## Summary

> 🏃‍♂️ Elevate Your Workout Game!

## Quick Answers

- **What is this?** Polar RS300x SD Heart Rate Monitor by polar
- **How much does it cost?** 111 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/1421304-polar-rs300x-sd-heart-rate-monitor)

## Best For

- polar enthusiasts

## Why This Product

- Trusted polar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Stylish:** Sleek orange and black design that fits seamlessly into your active lifestyle.
- • **Peace of Mind Warranty:** Enjoy a limited two-year manufacturer's warranty for worry-free training.
- • **Train Smarter, Not Harder:** Unlock your potential with Smart Coaching features that guide your training intensity.
- • **Comprehensive Training Kit:** Includes everything you need: RS300X training computer, WearLink+ transmitter, and S1 footpod.
- • **Precision Calorie Counting:** OwnCal technology calculates calories burned based on your unique metrics.

## Overview

The Polar RS300x SD Heart Rate Monitor is a cutting-edge fitness tool designed for serious athletes. It combines a watch and heart rate monitor to optimize your aerobic training with Smart Coaching features, precise calorie tracking, and a complete training kit, all wrapped in a stylish and durable design.

## Description

You want to go for a run and know how speed and distance can aid your performance. Without heart rate, you can only get so far.

## Features

- Watch and heart rate monitor in one designed to help serious fitness enthusiasts study and optimize their aerobic training
- Smart Coaching features help you train at proper intensity for desired results; Polar Fitness Test designed to remove guesswork from training
- OwnCal calculates number of calories expended during a training session based on weight, height, age, gender, and maximum heart rate
- Comes with Polar RS300X training computer, WearLink+ transmitter, S1 footpod, RS300X Getting Started Guide, and S1 foot pod user manual
- Includes limited two-year manufacturer's warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 6.8 x 5.1 x 3 inches |
| Package Weight | 4.3 Pounds |
| Item Dimensions  LxWxH | 2 x 2 x 1 inches |
| Item Weight | 2 Pounds |
| Brand Name | POLAR |
| Color | Orange / Black |
| Manufacturer | Polar |
| Part Number | 90036631 |
| Style | Digital,Quartz Movement |
| Sport Type | Excercise & Fitness |

## Images

![Polar RS300x SD Heart Rate Monitor - Image 1](https://m.media-amazon.com/images/I/81xD7WB0e+L.jpg)
![Polar RS300x SD Heart Rate Monitor - Image 2](https://m.media-amazon.com/images/I/71kpK32u5fS.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great product
  

*by J***R on Reviewed in the United States on April 27, 2010*

I purchased this watch after running my first marathon and having a conversation with a guy during the race, who was wearing a polar watch. It really came in handy during the race to make sure we were on pace for our goal. Using a standard watch is nice but as we all know, race mile markers aren't certified and therefore your splits will be off. The footpod is great but you absolutely need to calibrate it. Not sure if its my stride but it was not very accurate out of the box, I ran a half marathon (13.1 miles) and it registered about 14.5 miles. The menus are fairly easy to figure out but I did need to consult the user manual a few times. I personally love the fact that you can customize and switch between 5 different views on the fly while running. The heart rate monitor is your basic type and works well. Overall, I would say this product is worth it if you do longer races including or above a 10k or if you train by yourself. Having the information this watch provides is great for pushing yourself.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Nice features for the price, but complicated and large
  

*by A***K on Reviewed in the United States on January 24, 2011*

I received the Polar RS300X as a gift, after mentioning to my husband that I thought it was a good deal considering the package came with the footpad - an expensive addition for some other brands. The heart rate component was the first priority for me and I could have gone cheaper just to get that, but I liked the training computer options and the idea of uploading my data to Polar for analysis. The excitement was short-lived however, when I figured out that another purchase: 
  
Polar Flowlink







  
  
     was necessary to upload the data.  The good deal became 'less' at that point.  Why not include that in the package too?When it arrived I was not overly thrilled with the dull red/orange color, or the size of the watch (huge on my small wrists).  Sunto made some prettier ones and I'd considered them, but the price and what came with them was the deciding factor.  Remembering this, I sucked it up and read the Polar manual.The manual is not as clearly written as it could be, but it's adequate.  The watch isn't the easiest to navigate, but with practice, you can get it done.  The heartrate monitor is accurate and once you put in your personal data (weight, height, etc...) you can get the computer working for you - saving data when you tell it to do so during a workout.The footpod is a good addition for anyone who is a runner or walker and wants to keep track of pace, time and distance. There is no GPS on this watch (like the Garmin Forerunner), although you can buy a GPS pod to be used with it instead of the footpod. The batteries are not 'easy' to swap out, but if you use a gentle hand and are patient, you can get it done.  The footpod does attach securely to your shoe, but it's a bear to get on and off, so I'd recommend putting it on one pair of your running shoes and leaving it there until you need to replace the batteries.  You have to turn the footpod on and off each time its in use by pushing the red button on the top of it.  If you forget to do so, you'll get both a dead battery on the footpod (AAA type) and inaccurate training info on your Polar watch.I've enjoyed using the footpod and then using the Polar Flowlink (not included in this package) to upload my training info to the Polar website.  They graph the data you upload and offer assorted calculators to maximize your training.  The Flowlink works flawlessly for me (using a Vista 64-bit machine) and I'd recommend this as an additional tool to fully enjoy this watch.The display on the watch is easy to read, but the buttons seem as though they may lack durability - time will tell.  The strap seems substantial and despite its size, the watch is comfortable to wear.  The chest strap is washable and you must wet the electrodes prior to wearing it for the heartrate monitor to accurately work.  A 'pod' of sorts snaps on to the strap and is removed for washing, however there is no on/off button on it, so hard to tell how the battery in it will hold up.Batteries are a big issue for this package.  The manual states you should send your watch to Polar (or go to a local Polar dealer) for battery replacement or you'll void the warranty. Others have commented on the short chest strap tansmitter and the footpod's battery life.  Time will tell how it will work for me in that department.I have no point of reference regarding training watches as this is the first one I've owned.  I like the data it can produce, and I think it's accurate.  I can see it being very helpful in training for future 5 and 10K races, as well as keeping me in a good training zone while at the gym.  I'm not crazy about the lack of clarity in the manual or the ease of use, but each time I use it, I feel a bit less intimidated by it and enjoy the information it gives me.Overall, I'd recommend it, but I'm sure there are others out there that are even better.  How much you'll pay for those other watches though, may send you back to purchase this one.UPDATE - March 9, 2011:I'm off to take a run wearing my Polar watch, chest strap and footpod.  It all took a bit of getting used to, but I've found I like it and battery life on all three seems good.  The footpod isn't noticed after a short time, but is tough to get on and off my shoes so I have designated one pair of running shoes just for them!The footpod has to be synced with the watch and then you can record your activity with pace and mileage included.  The chest strap is comfortable to wear, and after a short time I forget it's on.  The watch is easy to read and so far, the buttons are holding up well.I purchased the Polar Link separately and enjoy uploading my workouts to the Polar Trainer on their website.  It lets me see graphically the time spent at specific heartrates, distance, pace, etc... and keep a calendar to see my progress.The heartrate monitor seems accurate and overall I'm pleased with this purchase.  It's a great fitness tool.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Totally changed the quality of my workouts!
  

*by K***R on Reviewed in the United States on October 24, 2010*

I wanted a HRM to do the following functions:-Track my heart rate during Spinning-Report my calorie burn after a cardio workout-Track my mileage when running outside-Report on my pace when running outsideThis HRM + foot pod does all functions beautifully, simply and clearly.  I lost 3 lbs in the one month since I've had it and increased my running distance from 7k - 12k!  Just knowing what's happening inside your body and being able to keep track of mileage, pace, calories and heart rate is tremendously motivating to me!Emily Segal[...]

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-26*