1. Adopt LED digital tube display, visible distance is 10~50meters 2. ... and simple performance, firm structure, high accuracy.n Adopt LED digital tube display, clear and bright, visible distance is ... )1.8”2.3”3”4”5”Visual range (M)2030405050N.W(kg)2.32.32.33.23.2Product dimension ... , school, factory, supermarket, warehousing, hospital, and indoor environment etc. LED Thermo-hygrometer (large display)