Universal wrist-top mounting enhancement and night safety reflector.
Allows you to conveniently keep your Polar product on top of your long-sleeved cold weather training gear thereby making it easier to see, hear and operate when wearing heavier jackets. It also has a bright 360 degree safety reflector built-in to make you more visible to cars and other vehicles. Works with Polar CS300 and all Polar AXN-series, F-series, FS-series, RS-series and S-series wrist mounted products (except with the F92ti, F4 female and AXN700).