The AQUAFORCE EL BACKLIGHT MARINES WATCH features a 40mm face and ABS plastic case with stainless steel metal back. It also has a durable nylon/leather strap. The face of the watch has luminous hands and a EL backlight. The AQUAFORCE EL BACKLIGHT MARINES WATCH is also Water Resistant to 50 Metres and all AQUAFORCE watches have a 2 year warranty. All watches use a high quality Japanese Quartz Movement.