Weather Stations by ORIA. Details:Feature 1. Rate of Change Icon: The rate of change icon detects rapid changes in temperature and humidity. 2. Three Button: MIN/MAX button, LIGHT button, CHANNEL button on the top, and °C/°F button in the back. 3. Backlight Mode: It has three levels of brightness. Press the LIGHT button to choose the bright you like. 4. °C/°F Transition: Press the °C/°F button on the back to transit between between degree °C and degree °F. 5. Wireless Transmission (in open air): 100 meters 6. Frequency: 433 MHz 7. Update Rate: 60 seconds 8. Base Station: 3 x AAA 1.5V Alkaline or Lithium batteries (not included) 9. Remote Sensor: 2 x AAA 1.5V Alkaline or Lithium batteries (not included) 10. Battery Life: Minimum 12 months for base station with one sensor and excellent reception. Note: 1. To avoid permanent damage, please take note of the battery polarity before inserting the batteries. 2. It is not recommended leaving the backlight on for a long period of time when...