Weather Station with Atomic Clock Indoor Outdoor Thermometer Item is brand new never used, I listed it as open box only due to factory box item comes in has little wear. Wireless, Humidity and Temperature Monitor Barometer Hygrometer with High Precision Sensor White About this item ?Weather Station Indoor Outdoor Thermometer Wireless with 7.6 inch Display?Larger, clearer screen viewing angles, comfortable color, indoor outdoor temperature (C/F), inside outside humidity, barometric pressure, moon phase, calendar, atomic clock, weather forecast and trend, daily MAX/MIN data. ?Weather Station Atomic Clock with WWVB Function?Additional WWVB function make it is convenient to use, you do not need to adjust time, the weather station will adjust real time everyday with WWVB function on. ?Support up to 3 High-Precision Sensors ?The display is in several colors and the numbers are big enough for you to see them from the side of the room. 328FT/100M wireless range away from the base unit. Temp accuracy: +/-0.5F, humidity accuracy:+/-2%. The package includes only one sensor. Search B0DM5WPC1F for additional sensors. ?Require 5.0V AC Power Adapter?Attention: with power adapter if the screen turn dark, because every hour to search atomic time, the screen will automatically turn dark for 7 minutes, then stay on after searching. With attached power adapter for full functional screen, including constant backlight and adjustable settings (high-low-off). When it is powered by battery (not included), the backlight will turn off after 11s light to save power. ?Weather Forecast?Different weather icons, next 12-24 hour weather forecast, 7 to 11 day calibration. Any technical or quality issue, we are here to assist you. ? ? ? ? ? ? ? 1. Question: C/F, 12 hour/24 hour switchable? -Answer: Yes. 2. Question: Assembly/installation? -Answer: 1. When the battery is low, the host screen has a low battery display. Otherweise no low battery. 2. Remove power adapter, take out battery, reset the main unit and sensor. Load the batteries in all the sensors first, then main unit. Confirm whether the main unit and sensor are in the same channel. 3. After replacing the battery or resetting, LONG PRESS "CHANNEL" BUTTON. ? I have 20 years selling on ebay and over 1500 5 star reviews