content: I have used this HRM for 4 months now and love it. I mainly use it riding my bike. Comes with a handlebar quick-mount for bike that is nice to use so can see it always without taking hands of bar.Trying to decide I found Polar (and others) had too many models and they carefully structured features/price to make you spend $50 to $150 more. This HRM has a ton of features (all that I need) and a great flexible display. I don't think it has a light.While working I like to display the Heart menu so I can see % of max constantly and a % graph and my current HR. It's easy to move thru the menus and see all the info. Keeps a running tally of calories, I think I burned 20,000 so far.The Sigma Sport website is very well done and shows all the info you need to decide. This is a best buy.