⏰ Time waits for no one—make it atomic! 4-inch tall numbers for effortless readability. Use it as a wall clock or desk clock with ease. Monitor indoor and outdoor temps at a glance. No messy wires—place the sensor up to 100ft away. Stay in sync with atomic accuracy, updated daily! Battery Powered Atomic Accuracy Indoor/Outdoor Temp The Sharp Atomic Clock offers unparalleled accuracy by synchronizing with the US government's WWVB radio signal, ensuring it is always precise to within one second. With a large 4-inch LCD display, it provides easy readability and features both indoor and outdoor temperature readings via a wireless sensor. Battery-powered and easy to set up, this clock is perfect for any room in your home.