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.
Both cars can be equipped with optional torque vectoring, a brake-based system built to augment the mechanically locking rear differential and help put power to the ground.
While subsidies have impacted margins, they have also helped the bigger carriers use their greater negotiating power to offer a wider choice of smartphones at low initial prices, thereby locking in customers for the longer term.
Most of its profit now comes from constructing large solar power plants and selling them to debt-financed shell companies set up solely for the purpose of locking in a fixed yield based on electricity sales to utilities.