What does the Activforce 2 measure?

What specifically do you do with the Activforce 2 and what does it measure?

The Activforce 2 provides accurate measurements of the following:     

• Active and Passive Range of Motion (AROM & PROM)
• Peak Force
• Average Force
• Force over Time
• Force/ Weight Ratio
• Muscle Symmetry
• Neuromuscular Deficits