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, when wearing Philip Stein watches. Case: Stainless steel Caseback: Screw-down, with a sapphire crystal window Bezel: Black PVD coated stainless steel, unidirectional rotating Dial: Black/Silver Hands: Black, luminescent Markers: Luminescent Arabic numerals Calendar: Date window at the 6 o'clock position Strap: Grey rubber Clasp: Pin buckle Crystal: Sapphire Crown: Screw-down Movement: Swiss quartz Water resistance: 20 ATM/200 meters/660 feet Case measurements: 46mm in diameter x 15mm thick Strap measurements: 29mm wide x 8 inches long Box measurements: 5 inches wide x 6 inches long x 4 inches high Model: 34-BGR-RGR All measurements are approximate and may vary slightly from the listed dimensions. Men's watch bands can be sized to fit 7.5-inch to 8.5-inch wrists. A screw-down crown (knob) creates a water-resistant seal. To unscrew the crown, turn counter-clockwise and pull/push into position to set time, date, and other functions. To close the crown, press it against the case and turn clockwise.
