Timex Expedition Field Post Solar - TW2V03600Featuring a solar powered movement that lasts up to 4 months and eliminates the need for battery changes, our Field Post 41 Solar is a military inspired outdoor watch made to accompany you anywhere. It also boasts an anti reflective sapphire crystal, 100 meter water resistance rating and a screw down case back and crown in a perfect 41mm case profile. And thanks to the luminescent hands and dial markings, the sun works overtime to make this watch