Feature:1. [Multi Area Monitoring] This indoor outdoor thermometer comes with one wireless outdoor sensor and can connect up to three wireless sensors, allowing monitoring temperature and humidity in multiple areas.2. [Dual Power Modes] This weather thermometer can be powered by power cord or battery (not included). Perfect for placing in your RV to track external temperature and humidity changes and prepare for varying weather conditions during your travels.3. [Clock and Calendar] Featuring wireless radio controlled time and dual alarm functions, this weather clock station enables accurate time tracking. It also includes a calendar function for added convenience in your daily life.4. [Weather Forecasting] By collecting and analyzing the past 12 hours of barometric pressure index, this station displays current weather information and predicts weather trends for the next 12 hours.5. [Large LCD Display] The large LCD digital display screen provides clear visibility of various data, with three channels divided in advance for easy viewing of temperature and humidity in each area, allowing for prompt adjustments.Specification:Item Type: Wireless Indoor Outdoor ThermometerMaterial: ABSFeatures: 1. Basic perpetual calendar, clock function, 12 hour or 24 hour time format2. 7 language options for week display: English, German, Italian, French, Spanish, Dutch, Danish3. Full function touch button4. Weather forecast function, able to predict climate change in the next 12 hours5. 2 alarms can be set, the snooze function can be set (OFF or 5 to 60 minute)6. Can display sunrise and sunset times in 251 mainstream European cities (manually required for US cities)7. Lunar phase and tidal function8. Adaptive backlit9. Humidity: Indoor and outdoor measurement range: 20 percent RH to 95 percent RH10. Temperature:Indoor temperature measurement range: -9.9 (15) to 50 (122)Outdoor temperature measurement range: -40 (-40) to 70 (158)Outdoor thermometer alarm11. 24 hour record of the minimum and maximum values of air humidity and temperature12. Indoor comfort and risk display13. Outdoor high and low temperature warning and frost warning14. Wireless outdoor sensor:Can be installed on wall or placed on table433.92MHz RF transmit frequencyTransmit range of 60 meters in an open area15. Atmospheric pressure:Atmospheric pressure measurement range: 600hPa or mbar to 1100hPa or mbar, 17.72inHg to 32.50inHgPressure unit in hPa or mbar or inHg16. Support for up to 3 wireless outdoor sensors (1 sensor included)17. Power supply:Main unit: 2 x AA batteries (not included) or DC 5V 1.2A (USB power cord)Outdoor wireless sensor: 2 x AAA batteries (not included).Package List:1 x Wireless Indoor Outdoor Thermometer1 x Accessory1 x User Manual1 x Power Cable