Signal tracking device

From Halopedia, the Halo wiki

A scanner is a kind of UNSC detection equipment seen being used in part 2 of the Arms Race video trilogy. The scanner appears to be used for displaying the location of a tracking signal. It is possible that it is used for other purposes, although none are shown.

S. Hartley Retrieves The Case using a Scanner

The scanner appears to have a flat panel display and emits a beeping that gets faster the closer it is to the target.

Trivia

References

  • Halo Arms Race Part 2