The AcuRite 18-inch Indoor or Outdoor Copper Clock features atomic time and precise, reliable temperature readings. Atomic clock is radio-controlled to maintain the correct time with split-second precision, and automatically adjust itself for daylight saving time (DST). Durable, weather-resistant copper metal construction is suitable for all seasons - indoor or outdoor use. Includes an integrated hang hole for easy wall mounting. One-year limited warranty. It's more than accurate, it's AcuRite.