About the technology: Classic and sport timepieces with Natural Frequency Technology work with the body's natural energy field. Philip Stein is with you all day??from the office to the gym and everywhere in between. Clinically proven to improve sleep and reduce stress, Philip Stein watches are a favorite with athletes, business executives, and everyone who believes that their strength, balance, and well-being are important. About the watch: Size 2 head, fits 20mm strap. 23-karat yellow gold-plated and stainless steel case. Subdial enables second time zone function. Arabic and Roman numeral markers. Water-resistant to 3 ATM (100 feet). Imported.