Fangrui Product Details This State-of-the Art Measurement Instrument Is Engineered And Designed To The Highest Quality Standards To Assure You Uncompromising This Instrument Will Measurements Of Wind Speed & Direction, Wind , Temperature&humidity. All Maximum/minimum Data Can Be Recorded And Displayed. In Addition, The Time Of Recorded Data Can Be Displayed As . The Weather Alarm Can Be Set Separately, Any Value Can Be Set. The Alarm Signal Lasts 2 Minutes. Wind Speed And Wind Direction Display. Average Wind Speed And Gusts Display. The Units Can Be Set As M/s,km/h,mph,knots Or ( Setting). Wind Speed Range: 0 To 50 M/s; Wind Direction Range:e,s,w,n,se,ne,sw,nw. Specification: Outdoor Temperature Range: Alkaline Batteries: -4f To 140f (-20c To 60c) Lithium Batteries: -40f To 140f (-40c To 60c); Resolution (for Both Indoor/outdoor Temperature): 2f/1c Temperature Accuracy: 2f/1c Humidity Range: To Humidity Accuracy: Receiver: Alkaline Battery: 2 Aaa 1.5v Wind Gauge Remote Sensor: Alkaline Battery: 2 Aa 1.5v Or Aa Lithium Battery(not Included) Battery Life: 12 Months (.) Calendar: The Hour Display Can Be Set Between 12 Hour Or 24 Hour . The Time Zone Can Be Set From-12 To +12( Setting). Daylight Saving Time Is Adjusted Automatically (the Daylight Saving Time Is Adjusted On The Basis Of Different Time Zone). The Date Display Can Be Set As: Yyyy-mm-dd, Mm-dd- Yyyy,dd-mm-yyyy ( Setting). Wireless 433 Mhz Receiving. Available Distance: 328 Ft In Open Field. While Receiving Rf, Press Any Key To Quit. Indoor/outdoor Relative Humidity (rh %) Display. Display Range: To . Resolution: . Wind- Temperature Display. Display Units : F / C ( Setting). Dew- Temperature Display. Display Units : F / C ( Setting). Material: Plastic Colour: White Package Contents: 1 X Professional Wireless 1 X Receiver Only The Above Package Content, Other Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.