Manufacturer: ORIA. Indoor temperature (0 - 60C); Outdoor temperature (-40 - 60C); Humidity (10% - 99%). The temperature and humidity accuracy: +/- 1C, +/- 5%; Wet: humidity more than 65%; COM: 45%-65%; DRY: humidity less than 45%.
Have ready some negative comments on these, but tried them and have found NO ISSUES with neither set (bought two). Good range, accurate and working top notch! Highly recommend.