The phone contains the ability to detect motion on a limited scale.

The Sixaxis is named for its ability to detect motion in the full six degrees.

Looking back along the last passage, Arlene was sure that she detected motion in the darkness.

I detect motion and a moving heat source emerging from one of the damaged buildings.

They use their eyes to detect motion, and if it is sudden they will attack.

Several times it seemed he detected motion, but he could not be certain.

Some claimed to be able to detect motion but they weren't agreed on which way.

He would walk a few more meters and then make a turn as if he detected motion.

By stopping and holding his breath for a moment, he clearly detects motion coming from there.

They must be able to detect motion quickly, so they have keen vision.