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 (46 mm in diameter, 14 mm thick), Screw-down caseback with sapphire crystal window, Black PVD coated unidirectional rotating bezel, Dark grey dial with silver textured center and black lined frame, Black luminescent hands, Luminescent Arabic numerals and hour markers, Date window at the 6 o'clock position, Small seconds subdial at the 6 o'clock position, 24-hour time display at the 3 o'clock position, Chronograph function features an orange sweep second hand and Design: Holidays Style: Casual Occasion: Birthday Adjustable: Yes Shape: Round Oval Material: Stainless Steel Dial Color: Black Movement: Quartz