Do you know if you are being exposed to harmful radiation? The RDX-1 affordable hand-held portable radiation meter is small enough to go anywhere and as sensitive as the $1000 professional models since RDX-1 Detects minuscule amounts of gamma, beta or X-rays. The units Geiger Muller tube Detects all gamma and beta isotopes released by nuclear power plants such as iodine and cesium. It is ideal for Homeland Security and for detecting environmental / industrial contamination. It can be used to screen for radiation in air, food and water. Designed for nontechnical persons the RDX-1 uses a very sensitive 200VDC, Geiger Muller tube detector; and yet offers easy one-button operation.