The indoor HUB device that controls your weather station must be plugged in, although it consumes very little power. The HUB is delivered with a standard USB 2.0 A-Male to Micro B cable. You will need to supply the USB wall charger (AKA: power supply, the thing you pull into the wall). Please ensure that your USB wall charger supports at 1.0 amps or higher to function properly. Amazon Basics makes a totally adequate USB wall charger found in USA here: http://a.co/6v2Ylmf You can also use a common USB wall charger like one you likely have to charge your modern smartphone or tablet.
Why doesn’t WeatherFlow include the USB wall charger with the station? Good question. With all the various plug types around the world, it’s quite difficult to maintain separate regional inventory at our current scale. In addition, we found that a vast majority of users have many USB wall chargers around the house for charging phones etc. Further, it’s becoming more common to have direct usb outlets in a household. Finally, the USB interface allows for remote power operation using a USB power brick. With all these options, we decided it wasn’t worth raising the cost of our stations by ~US$20 to include a USB wall charger. Now you know.