31.   The device will work for about three months with two button-cell batteries.

32.   The device works by digitally imaging the color differences between cells that have been treated by a laboratory dye.

33.   The devices do not work underwater.

34.   The devices still work in the kitchen, where dishes are washed in their places on mesh shelves, and the prison-green walls are waterproof.

35.   The device does not work for live programs, news or sports.

36.   The device could work only when activated from close range, and could not store previously recorded conversations, officials said.

37.   The device will work with conventional television sets, television-VCR combinations and digital television recorders like TiVo or ReplayTV.

38.   The device works with a wireless Web and Java-enabled telephone and allows the traveler to type longer messages.

39.   The devices work with most phones, including cordless and cellular models.

40.   The industrial designers typically work with mechanical engineers and ergonomists to get a sense of how the new medical device would work.