La Crosse Technology S88907 Vertical Wireless Color Forecast Station with Temperature Alerts Color forecast icons with pressure tendency. Adjustable backlight. Temperature alerts (in/out). Monitors indoor & wireless outdoor temperature (F/C) & humidity WWVB self setting time and date with automatic daylight saving time updates Power Requirements: Display: 5.0V AC adapter (included inside lower panel) for primary power; Optional 3 "AAA" Alkaline batteries for backup (not included); Sensor: 2 "AA" Alkaline batteries. Weather Station : 6.1 W x 9.6 H x 1.06 D The remote sensor reads the environment where it is mounted. NOTE: Refer User Manual on Technical Specification before use