Londa 433MHz Wireless Weather Station LED Backlight Digital Alarm Clock Indoor Outdoor Thermometer Hygrometer Barometer Black Digital thermometer with wireless remote. Accurate data from the outdoor transmitter updates every 35 seconds. After you install the batteries, please wait for 10 to 60 minutes, because the sensor is more sensitive than main unit, then the temperature and humidity will gradually go steady Time, Month, Date, Day Moon phase display Double alarm and snooze Full Color Backlight Indoor/outdoor trend indication of temperature/humidity