Its second-generation Ankle Mimicking Prosthetic Foot (AMP-Foot 2.0) uses a pair of force sensors to determine the leg's relative position and let an actuator build energy when the foot bends, locking the power away to use only when the owner pushes off.
The left side sports the power button, a lever for locking screen orientation and a volume rocker, while the top has the 2-megapixel front camera and 5-megapixel rear-facing shooter.