- Instant on
- Bright green vacuum-fluorescent display
- Instantaneous audible response
- Isotope indicators - Front & rear panel
- Ten second count - Display memory for 4 seconds
- Range - Changes in signal are distinctly heard
- Detects 511keV photons
- Threshold - Normally "On" reduce energy-scattered events in signal
- Press "Off" to increase sensitivity for a spatially-isolated site.