Specification: Case diameter: 5.1cm(1.85inch) Case thickness: 1.5cm (0.59inch) Max Band length: 26.0cm (8.26inch) Max Band width:2.4cm(0.98inch) Net Weight:87g MULTIFUNCTIONAL:Both LED backlight and the traditional analog quartz movement time display of the specific design,5ATM daily life water resistance,enable with time display,date,day,week and alarm function. WATERPROOF:5 ATM waterproof 50 Meters for daily use. Suitable perfectly for all kind of daily use. Hand wash, shower, sweating or rainy day,NO PROBLEM!In general, withstands splashes or brief immersion in water ADVANCED MANUFACTURING TECHNOLOGY:Original Japanese time module quartz movement,real stainless steel buckle and back case,comfortable Leather watch band,a perfect watch for outdoor sport lover. DUAL TIME DISPLAY：Digital LED numeral time display and analog quartz watch time display,looks so cool.Press the button on the case and the luminous bright time display is easy to read in the darkness. DURABILITY:In addition to strong base of silica gel , hydrofluoric acid, do not dissolve in water and any solvent, non-toxic, odorless, chemically stable. Product description Feature: Additional backlight function to show the time clearly in the darkness Four buttons to control different functions 50 meters water resistant (PLEASE DON'T PRESS ANY KEYS UNDERWATER) Material: Case material: alloy Band material: Leather Dial window material type: hardlex Mirror surface: scratch resistance lens Package Included: 1 * Nice watch 1 * Document **NOTE**: Please DO NOT pull out the button under the water. Too much water contact or use it in the extreme hot or cold temperature will shorter the watch life.