The new, fully loaded 3rd generation Citizen Skyhawk redefines atomic timekeeping with radio controlled accuracy and Eco-Drive technology. Radio signals are received both automatically and on-demand by the fully loaded Skyhawk A-T. Atomic Timekeeping With Radio Accuracy Eco-Drive Technology (Solar Powered, no need to change batteries!) World Time for 43 Cities 2 Alarms 24 Hour 1/100 Second Chronograph Perpetual Calendar to the year 2100 Analog/Digital Displays 99 Minute Countdown Timer With Alarm Water Resistant to 200 Meters Five Year Citizen Warranty