This digital projection alarm clock features a clear display for easy reading of time, weather forecasts, and environmental data. Supports up to three high-precision wireless sensors (one included) for monitoring temperature and humidity in multiple indoor and outdoor locations, with transmission range up to 60 meters. Includes comprehensive measurement capabilities: indoor temperature ranges from -9.9C to 50C (14.2F to 122F), outdoor temperature from -40C to 70C (-40F to 158F), and humidity from 20% to 95% RH. Additional features include barometric pressure trend analysis, moon phase display, perpetual calendar up to 2099, dual alarms with snooze settings, ice alert, and projection function with 180-degree rotation. Power options: USB cable (DC 5V 1.2A) for main supply, backup battery CR2032 (not included), and remote sensors requiring AA batteries (not included). Package contents: 1 projection weather clock, 1 sensor, 1 USB power cable, and multilingual instruction manual. Note: Screen displays weather forecasts based on pressure changes after an initial 7-10 day calibration period; slight color variations and measurement tolerances (1-3 cm) may occur.