This flexible, disposable thermometer takes temperature range of 96.0 F to 104.8 F (35.5 C to 40.4 C) in 1 minute for oral readings or 3 minutes for auxiliary readings, no batteries required. Temperature is indicated by the last black dot on the chart. These thermometer strips conform to ASTM E1299-96 safety requirements under ISO13485 standards, are non-toxic, mercury free, latex free, helping in the fight against COVID-19. Each piece comes individually sealed in a package with instructions. Proudly made in the USA. Quantity ordered must be in increments of 500 pcs.