With this CDV-720, there's no guesswork. It really works! It determines radioactive contamination levels that could result from an enemy attack or nuclear disaster. Police and firemen used similar units like these in the '60s. It reads gamma radiation and will detect as high as 500 roentgens per hour.

Also detcts beta radiation from fissionable materials. Bulit-in meter, mode selector and carry handle. Uses one D battery (not included). Measures 8 ¹/2 x 4 ¹/2 x 4", weighs 4 lbs. Condition: brand new, may have some shelf wear due to long-term storage.

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