AcuRite 75077A3M Wireless Weather Station with Large Display, Wireless Temperature Sensor and Atomic Clock Huge display with well-spaced data for very easy, uncluttered reading;Data Reporting: 16 second updates Atomic clock updates time with split-second accuracy and automatically updates for Daylight Saving Time 12 to 24-hour weather forecast displays 14 different icons to help you plan the day ahead Patented Self-Calibrating Forecasting pulls data from a sensor in your backyard to give you the most accurate forecast for your exact location Wireless range of up to 330 feet (100 meters) depending on home construction materials. Wireless Signal: 433 MHz Dimensions - 6.2-inch Height x 7.9-inch Width x 1-inch Depth