REACTOR Men's 71501 Heavy Water Black Coral Dial Polyurethane Strap Watch Quality Japanese-quartz movement Unidirectional rotating timing bezel Durable, accurate quartz movement or world tide digital with temp. sensor, EL backlight, countdown heat timer, multiple alarms and 1/100th sec. stopwatch Steel reinforced polyurethane band Water resistant to 660 feet (200 M): suitable for recreational scuba diving