A simple motor drives two cables inside the tentacle, and the wearer controls it with a pair of switches on the upper section.
The user simply puts the tentacle in place, hits the switch, and it curls around whatever you might want to carry. The other switch unfurls the arm.
"The basic functions it does are holding things down, grasping and gripping," Kau says. "You can control the amount of curl it does, and it can curl around quite a few objects."
Designed for a class project while getting her degree, the tentacle arm is not only functional but would be a lot cheaper to produce - making it available to many more amputees.
If somebody lost their arm and this is their only alternative, I say more power to them!