Honeywell TE219ELW Weathertime Wireless Indoor/Outdoor Thermometer with Atomic Clock 3-channel indoor/outdoor thermometer displays temperatures in up to 3 remote locations Includes single wireless sensor with 100-foot range; displays temperature in C or F Built-in clock receives radio signals from U.S. Atomic Clock for consistent accuracy Temperature range as wide as -38 to 158 degrees F; dual-crescendo alarm with snooze Blue backlit LCD display measures 3.33 x 6.19 x 1.11 inches (W x H x D); 1-year warranty