Light weight, battery operations ( battery not included) and construction make this electromagnetic radiation detector a tool for on the going assurances Equipped with a precisions tube sensors, this radiation monitor delivers data for materials, environment, and applications in a small size, pocket sized design High sensitivity geigers Counter with wide measurement ranges and durability ensures accurate radiation detection for everyday and professional use Ideal for engineers, researcher, and homeowners seekings real time radiation analysis in lab, industrial site, or residential space detect radiation levels home, during travel, or in workplaces with this user friendly device featuring intuitived interfaces and instantly readings, Manufacturer: ZBIianxer