This is a watch in very good condition apart from the fact that the light button no longer works. In the manual this buttons functions are described as:
1) Illuminate the display (the display is always illuminated, however, pressing this button makes the display a degree brighter)
2) In time view, press to view battery status (raising your arm while wearing the watch does this as well)
3) Press and hold to lock all buttons
So apart from the brighter display, you are not losing much functionality

I've included a number of photos of different screen views to try and show that the lack of the light button is insignificant.

The watch comes boxed with a charger cable (usb connection, no plug)

The watch has had a screen saver on from new therefore the screen is clean and scratch free.

I have reset to factory settings ready for the new user to open a polar flow account and get training!

Any questions, ask away....