This feature-packed weather station features radio-controlled time and date, forecast icon based on changing air pressure, outside temperature, inside temperature, inside humidity, and a comfort indicator. It takes temperature samplings every 10 seconds indoors, every 4 seconds outdoors, and an indoor humidity sampling every 15 seconds. For up to 20 hours, you can trust the station to be 75% accurate for the forecast - that’s a better rate that your local meteorologist for sure! So, you’ll be prepared for any weather conditions, regardless of the season. And, the unit’s stylish design will complement any décor. Requires 4 AA batteries, not included. Specifications: Indoor temperature range: 14°F to 139.8°F/ (-10° to 59.9°C); remote temperature range: -39.8°F to +139.8.2°F ( (-39.9°C to 59.9°C); temperature resolution: 0.2°F/0.1°; humidity range: 1-99%; transmission frequency: 915 MHz; transmission range: up to 330’ in open air; receiver size: 6 ½”L x 3 ½”H x 1 ?”W; sensor size: 1 ½”L x 1”H x 5”W.