MFJ’s exclusive solar powered Eternity Atomic ClockTM works for an “eternity”! No need for batteries or to set time! Receives WWVB signal. Display is a whopping 31/2Hx61/4Winches with huge 2” time digits. Choose 24 or 12 hour time. Has indoor temperature, running seconds, month/date and day-of-week displays. 91/2Wx61/4Hx1D in. Attractive silver metallic looks fantastic on the wall or desk mounted in the shack or office! Has power on/off switch for when clock is in storage or not in use.