With 9-volt battery. If in the USA, you can also order this product COD via E-mail. Pay only when it is delivered. Click here to hear a sound sample of the DX-1. Each click is the result of a detected radiation particle.
Some gem stones are radioactive.
They are irradiated to change their natural color. Some gems are naturally radioactive. If in the USA, you can order this product COD via E-mail. Pay only when it is delivered. X-Rays, Gamma Rays, Beta Rays, Cosmic Rays.