Found this while browsing the Dick Smith website. It's selling for 499$ at Rebel Sport.
-Wrist-based heart rate tracker
-Tracks pace, distance, calories burned and more
-Measures your sleep patterns
-Simple to use with concise graph and chart readouts
-Battery that lasts up to 9 days
By far the cheapest of the lot: https://pricespy.co.nz/product.php?p=3376682