We offer Grade (slope, incline, gradient, etc) as a field on our devices that are equipped with a barometric altimeter. You will see Grade as a field option on the Mega XL, Mega C, and Super Pro (and also on the discontinued Y10 Super GPS, Micro and Micro C GPS devices).
Devices without a barometer do not have Grade as a field option. These are the Macro Plus and Macro Easy (and also the discontinued watches, Y10 Macro GPS, and the Mini GPS). This is due to the difficulty in showing real time changes in elevation based solely on GPS signal.