AcuRite Wireless Weather Station with Wind Sensor, NO Size, Black - 634 Patented Self-Calibrating Forecasting pulls data from a sensor in your backyard to give you the most accurate forecast for your exact location Atomic clock updates time for consistent accuracy and no manual setting ever for DST Multi-variable history chart shows barometric pressure, temperature and wind speed Tabletop or wall-mountable design Strong signal penetration (enhanced 433 MHz)