... easily operate* 6 LED display* Counting mode: counting Up or counting down, counting up and down, selectable by software* CP1, CP2 input, reset signal input ... F, C, R* Counter speed: 30Hz/300Hz/1000Hz/5000Hz,selectable by software* Modulus:0.00000-99.9999 (6 digit) / 0. ... ~50 CHumidity35~85%(RH) Welcome to contact us!IBEST ELECTRICAL CO.,LTD IBEST 4 Digit Display , Counting Up/Down Function Counter