LFF Atomic Clock, Never Needs Setting, Battery Operated, Atomic Wall Clock with Indoor/Outdoor Temperature, Wireless Outdoor Sensor, Large Display Digital Calendar Clock for ElderlyBrand: LFF Color: Dark Grey Features: ACCURATE ATOMIC CLOCK: The atomic clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Governments National Institute (NIST) in Fort Collins, Colorado. Digital wall clock adjusts time & calendar to atomic signal automatically, and could count seconds accurately. (Note: no backlight display) WIRELESS OUTDOOR SENSOR: The clock has built in high quality outdoor