Saitec &reg; High Accuracy Professional Jeweler Diamond Tester For Novice and Expert diamond Selector,Portable Diamond Gemstone Jewelry Tester Selector Tool Accurate And Reliable Reading LED Audio + Bag Platform Professional Diamond Selector II will indicate genuine diamond or fake Uses large / small switches for testing diamonds Emits audible sounds to easily differentiate the readings Batteries: 1 x 9v Battery (not included) Package Contents: 1 x Diamond Tester