Related Clues:
- High-tech detector
- Numerical entry aid
- Heat detector, e.g.
- Motion detector part
- Telephone panel
- Calculator feature
- Security system device
- Device that reacts to stimulus from snores
- Detector
- The sound of a banner, perhaps, that gets the signal
- Electric eye, e.g
- Radar gun, for one
- Automatic-door feature
- Thermostat component
- Part of a security system