Philip Stein timepieces use Electromagnetic Frequency technology utilizing electromagnetic fields, introduced in 2003, and Natural Frequency Technology, introduced in 2008. Wearers of Philip Stein watches have reported better sleep, less stress, clearer focus and better concentration when wearing them. Stainless steel case, Black silk strap, Pin buckle, Mother of pearl dial, Two Swiss quartz movements, Luminous hands, Arabic numeral hour markers, Sapphire-coated curved mineral crystal, 2 Swiss quartz movement, Water resistant to 30 meters/ 100 feet.