Related Clues:
- Light detectors
- Burglar alarm features
- Items on space probes
- Electric eyes, e.g.
- Features of some locks
- Cell features
- Detection devices
- They detect heat or motion
- Taste buds, essentially
- Objects of punches
- Accountants may work them
- Motion detectors, e.g.
- They feel for you
- They pick up things
- Eyes and ears