(1) Display indoor temp/humidity (2) Display outdoor temp (3) C/F unit selectable (4) MAX/MIN value memory (5)Reset function SpecificationsModel Number:H21641Function:Display Indoor Temp/Humidity, Outdoor Temp simultaneouslyRange & Accuracy:1. Indoor Temp: -10~+50C (14~122F) ± 1C 2. Outdoor Temp: -50~+70C (-58~158F) ± 1F 3. Humidity: 20% ~ 99% RH ± 5% Other features:1. C /F unit selectable2. ...