These are sold as optional items or accessories. This is the monitor only; no external sensors or remotes are included.   If you want the full system we suggest the WS-7394U-IT-CH

Dimensions:
6.1 x 1.2 x 6.3 inches

Features:

• WWVB time display with manual setting
• WWVB controlled calendar
• Display of extensive weather data, in all cases with programmable alarm functions for certain weather conditions as well as records of all minimum and maximum values along with time and date of their recordings
• Indoor and outdoor temperature display in degrees Fahrenheit or Celsius
• Indoor and outdoor relative humidity displays
• Air pressure reading in inHg or hPa, absolute or relative
• Detailed display of rainfall data in 1 hour, 24 hours, total since last reset in inch or mm
• Wind speed in mph, km/h, m/s, knots or Beaufort
• Wind direction display with LCD compass as well as numerical (e.g. 225°) and abbreviated characters (e.g. SW)
• Wind chill temperature display
• Dew point temperature display
• Weather forecast display by weather icons (sunny, cloudy, rainy)
• Weather tendency indicator
• Storm warning alarm
• LED back light
• COM port for easy connection to your PC
• All the weather data from the base receiver station and up to 175 sets of weather history data (with user adjustable measuring intervals) can be recorded and uploaded to your PC
• Mahogany trim