If having a precise timepiece is very important, then this AT (Atomic Time) is the answer. It’s the second Citizen watch I bought for my husband and he is thrilled by this watch. Sync’d with Fort Collins, CO for their time signal and hubby knows he is calibrated. Got a great price too, directly from Citizen Watch, so no need to hop all over the Internet looking for the best price. Never needs a battery is the second best feature of this watch. Spoil him...surprise him with this watch!