New Balance n4-need help

Catnyc123

does anyone have the new balance n4 that can explain how to use it? I have all my info stored but the manual is not helpful.
Silly question, but I have to use the chest strap in order for it to workm right? The HRM keeps saying my heart rate is 240??? I think Im doing something wrong.
Also, I used the default heart rate zones for light, medium and intense workouts.. is that ok?
I have no idea how to use this thing.

Thanks in advance!