3.5cm[product diameter]: 3.5cm[product material]: all metal body + optical acrylic lens[Battery model]: 2 CR1620 batteries (with no battery at the factory)[Applicable people]: students field investigation, jewelry identification, office, printing and manufacturing, elderly reading, etc.If you have any questions, please feel free to contact us. Your satisfaction is our goal. You can choose more styles and products when you enter the store.
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