Kentfaith WiFi Home Weather Station with Non-Stop Solar Power & 10.2" Ultra Large Display, for Weather Forecast

SKU: GW40.0001AUA

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Not sure what you are really asking, if you keep the display plugged into AC outlet it should last years. If you are running it on batteries it will last a month or so. The supplier recommends running on AC power. 
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I've very much enjoyed the integration between my Sainlogic weather station and it's compatibility with Wunderground. If you have issues, Google 'connect Sainlogic to Wunderground' and you'll find several sites with directions. There are also several YouTube videos on the subject. Of course this all depends on your WiFi connectivity and strength. 
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The display console unit can run on batteries only. However, without the a/c power cable, the display only stays on for seven seconds, and to get the display to come on, one has to press a button on the display console. Also, when running on batteries only, the unit will not maintain a wifi connection, so it won't reliably upload weather data to WeatherUnderground or other weather networks. 
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You can put it on a pole. Mine is on a 30ft pole. It works really great. Just make sure that it is not around a lot of trees. It can change some of the sensors like the wind speed and direction. And I found the first pole I had it on. In the wind, the pole wobble a little. So it effected the wind speed a little bit. So I used a little sturdier Pole and guide wire it. It did the trick. 
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Simple, u turn the plastic bracket around, fit the sq plastic in the other way, then get a wall bracket and pipe and mount your unit on the pie and finally on the wall 
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Yes, you can view it online. Once I setup the WiFi connection and registered my Sainlogic weather station with Weather Cloud, it appears on the WC web site with the current data from my station. 
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It just shows gusts and average, but when the gust stays the same that pretty much is current wind. 
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Yes. You can connect to Weather Underground and then share out your station info.