AcuRite 00509 Color Weather Station with Count Temperature/Humidity/Forecast Monitor indoor and outdoor temperature with daily high and low records and trend arrow that indicates whether temperature is Rising or falling Daily high and low records for temperature and indoor humidity Wireless all-weather outdoor sensor features wireless range of up to 165 feet (50 meters) 12 to 24-hour Weather forecast; sunny, partly cloudy, cloudy, rain, snow and rain/snow mix Illuminated color display with adjustable dimmer; electric-powered with optional battery backup