Clear, unbreakable lens, w/swing-out/folding action, (round, 3 cm across). 7 cm x 3.5 cm x 18 mm, (when folded closed). Belt clip. Uses two 3V lithium button cell batteries for L.E.D light(INCLUDED!!!). CAUTION: Do not place magnetic materials near computers, discs, DVD's, credit cards, or other items that are senstive to magnets. Do not place directly on computerized sewing machines.