WE SHOULDN'T BE GIVING THIS STUFF AWAY, but what the hay. Uses two "D" cell batteries when assembled according to instructions. Radiation shielded. Caution: DANGEROUS to use; potentially fatal. We will say you didn't get it from us-- and planting evidence in our support presents absolutely no problem-- think about it! We recommend you LOOK before you LEAP. Have fun! DON'T tell 'em Ask Dr. Hal! sent you. Also: Children's poetry from A Child's Garden of Verses and other sources.