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 wide x 42 mm long, 12 mm thick), Screw-in caseback with sapphire crystal window, Silver dial with mother of pearl textured frame, Silvertone luminescent hands, Arabic numerals, Silver guilloche subdials, Small seconds subdial at the 6 o'clock position, 24-hour time display at the 3 o'clock position, Chronograph minutes counter at the 9 o'clock position, Date window at the 6 o'clock position, Sapphire coated mineral crystal, Swiss quartz movement, Water resista Design: Holidays Style: Casual Occasion: Birthday Adjustable: Yes Shape: Rectangular Material: Stainless Steel Dial Color: Silver Movement: Quartz