[5-YEAR BATTERY LIFE] – A quality set of 4 “C” batteries will keep the clock running for up to 5 years – an impressive feat offering unparalleled convenience and peace of mind [ROBUST RECEPTION] Dual antenna provides best reception to WWVB time broadcast, even in heaviest electronic traffic areas such as hospitals or commercial buildings [CUSTOM TIME SET] Select from 4 USA time zones or Customize to any World Time [METAL FRAME] Stainless steel polished silver frame and shatter-proof lens [ECO-MODE] Optional Eco-mode feature also saves battery life; Q-MODE (Quartz mode) sets to any manual hour