Monitor indoor and outdoor temperatures at a glance. This digital thermometer features a wireless outdoor-temperature sensor with a 260-ft. range. Large LCD offers easy-to-read convenience. Records min./max. temperatures. Low-battery indicator. Wall-mountable receiver requires two AA batteries. Wireless sensor requires two AA batteries (not included). Receiver dimensions: 3.27"H x 4.33"W x 1.14"D, Wireless sensor dimensions: 3.41"H x 0.55"W x 1.27"D.