Press “MODE” once, the 2 points not flashing, then press “MODE” about 2 seconds and the screen display’Alarm’ mode. Humidity range: 10%99% RH. Temperature range: Indoor -50+70. Clock, Date, Calendar Function (Month and Date).
Thermometer Indoor Digital LCD Hygrometer Temperature Humidity Meter Alarm Clock
Press “MODE” once, the 2 points not flashing, then press “MODE” about 2 seconds and the screen display’Alarm’ mode. Humidity range: 10%99% RH. Temperature range: Indoor -50+70. Clock, Date, Calendar Function (Month and Date).