I have a new in the box Polar M600 that I ordered by mistake from Aeroplan. Turns out you can't cancel an order or return an order from Aeroplan!
Here is a link to the watch for all the info on what it does. Could be a great last minute Christmas gift. It works best with an Android phone.
https://www.polar.com/us-en/products/sport/M600-GPS-smartwatch