... and simple performance, firm structure, high accuracy.n Adopt LED digital tube display, clear and bright, visible distance is ... through buttons on the instruments.n Recording capacity: >=43000, RS232-USB interface. ModelHE218AHE223AHE230AHE240AHE250ATemperature accuracy±0.5°C±0.5°C ... school, factory, supermarket, warehousing, hospital, and indoor environment etc. LED Thermo-hygrometer (large display)