The Philip Stein Natural Frequency Technology is delivered to wearers through a metal disk inside the watch that has been infused with key frequencies in a proprietary process. When worn on the wrist, the watch exposes frequencies to the biofield - which is the master energy field that regulates the body's functions - and informs the body to relax and become more resistant to stress. Studies have shown, better sleep, less stress, clearer focus and better concentration, for wearers of Philip Stein watches. . . . . . . . . . . . . . . . . Brushed and polished stainless steel case 32 mm x 50 mm, 11 mm thick, Screw-in caseback with two sapphire crystal windows, Black dial with guilloche frame, Silvertone luminescent hands, Silvertone Arabic and Roman numerals and indices, Bottom dial displays an additional time zone, Sapphire coated mineral crystal, Two Swiss quartz movements, Water resistant to 3 ATM/30 meters/99 feet, Bronze satin leather strap, Pin buckle, Model number: 2-MB-IBZ.