La Crosse Technology WS-7049U-NAT Wireless Weather Station Sensitive, wireless weather station Wall-mount or place on table; easy-to-read display; LED backlight Included sensor transmits information to base from distances up to 80 feet Separate purchase of 4 AA alkaline batteries required; 2 additional sensors may be added Base measures 10.04 by 2.95 by 0.82 inches; sensor is 5 by 1.57 by 0.85 inches; limited, 1-year warranty