"The GAMMA is the latest evidence of Reactor's quest to build the best sport watch possible, starting with a massive 45.5mm dia. case for easy viewing, then adding the thickest ever application of Superluminova for extreme low-light performance. Other key features include a 10-year power supply, 300M depth rating and an anti-reflective coated crystal for easy viewing under water. Brushed Finished Case and Bracelet with Polished Accents Red Sunburst Dial with Day and Date at the 3 o'clock position Unidirectional Rotating Bezel Solid, Forged 316L Stainless Steel Case and Caseback; Extra hard, marine-grade stainless steel permits fine finishing and resists corosion. Caseback is made to provide a superior fit, increased strength and water resistance. Solid Screwbar to Case Attachment; This system is nearly 8 times stronger than the typical springbars typically used in watch construction. With this system you won't have to worry about losing your watch due to the band detatching from the case. Extra Thick Hardened Mineral Glass Lens; This K1-Hardened Mineral Crystal combines exceptional scratch resistance with unmatched shatter resistance. Triple O-Ring Screw Down Crown System; Extremely water resistant Triple O-Ring system not only provides extra protection when the crown is screwed in, but also provides protection to 100 Meters (330 Feet) if you happen to forget to screw the crown back in after setting your watch before getting in the water! Superluminova on Hands and Markers; The Swiss made Superluminova goes through a special application process to make these watches extremely visible when in a low lit area and will provide exceptional visibility for up to 8 Hours. Shock Resistant Movement Holder; A special casing helps to protect the already Shock Resistant Japanese Quartz Movement from severe impacts. Square Profile Caseback Seal; Having more surface area than the typical O-Ring seal, this provides a significantly superior water-tight seal. Over-Sized Screw Down Crown; Large size makes it easy to grip, un-screw and set the date and time with ease Comes encapsulated in a protective standing metal case and is revealed by rotating the outer case half. Black Rubber Strap 10 Year Lithium Power Supply Water Resistant to 300 Meters (990 Feet) with the Crown Screwed In 45.5mm Case Width (Approximately 1 3/4"") not including the crown 13.8mm Case Thickness (Approximately 1/2"") Weight: 200 Grams"