Note 2: To ensure the accuracy of the readings, please keep the base station and the sensor together for 48 hours when first turned on so that the indoor outdoor thermo-hygrometer can adapt to local conditions. Note 1: Please read the product details carefully before ordering, after receiving the goods, please read the user manual carefully. Please feel free to contact us first when you encounter any problems. Battery Backup & USB Port: The weather station clock comes with a battery to save settings and keep time running when the clock is disconnected from the power adapter. Please note that an adapter must be connected to operate the projection clock. Additionally, the station has a USB charging port so you can charge external devices when the projection clock is occupying the bedside socket. Indoor Outdoor Thermometer Hygrometer: The digital projection alarm clock can receive up to 3 remote sensors (only 1 sensor is included, search : B0BBGDDNK8 to get more if needed), which means you can simultaneously monitor 4 indoor / outdoor places within 167ft/60m without obstacles, such as balcony, backyard, living room, kids’ room, garden, office, storage cellar, etc., let you easily track real-time temperature and humidity data in different areas of your home or workspace. Dual Alarms with Snooze Function: The personalized 2 alarm clocks allows you to set different wake-up times for weekdays and weekends, as well as a snooze time can be customized between 1 and 30 minutes as needed. For convenience, the alarm icon on screen blinks 30 minutes before the set wake-up time, giving you ample time to turn off the alarm if you are already awake. Ceiling Projection Clock with Color Display: The weather clock station has a LCD screen that measures 4.8 inches, allowing you to easily check accurate weather data from a wide angle at a glance. It displays indoor outdoor temperature and humidity with max/min records, time and date, comfort level, indoor mold risk, weather forecast for the next 8 hours with pressure trend, etc. You can also adjust the display brightness automatically or manually with four levels: bright, dim, dark, and off. Atomic digital alarm clock Atomic Radio Clock Projector: The atomic projection clock can search and receive the local WWVB signal to calibrate the time every day automatically or manually, also the alarm clock projection supports the setting of Daylight Saving Time( DST). To ensure the accuracy of the result, please choose the correct time zone for the weather clock according to your location. (The backlight will turn off automatically during RCC reception.). Temperature & Time Projection Clock with Light Sensor: Uzoli projection clock features a light sensor that automatically reduces the backlight brightness at night, ensuring that the screen does not disturb your sleep. It clearly project the time and indoor / outdoor temperature on the wall or ceiling in a soft red tone at a distance of 4.92 to 8.2 feet (best at 6.56 feet). The projector's swivel range of 180° providing you with the flexibility to adjust the projection angle for optimal viewing.