3-D cast resin case give the impression of grouted stone withs multicolored gray, dial is protected by a glass lens. The movement and dial are completely weatherproof making a great Pool clock or outdoor location, oversize case has large easy to see numbers, white LED's automatically lights up in low light conditions/shuts off at first light (dusk to dawn), 5-hr timer or completely off, silent sweep seconds hand (no ticking ) tracks the minutes. Uses 5 AA batteries.(not included).