Dial window material type: Hardlex; Clasp: Push Button Hidden Clasp; Case diameter: 42mm; Case Thickness: 12.5mm; Band size: 22cm; Band Width: 20mm; Band Material Type: Stainless Steel. Original mechanical movement without battery to keep accurate time, easy to use. Adjustable solid stainless steel strap has been polished many times to make it more durable and scratch-resistant. Concealed push button hidden safety clasp is convenient and comfortable to wear and fits the wrist better. Three-dimensional Roman numeral scale, hollowing out design, sun and moon simulation display window on the bottom. Water resistant to 30M can withstand daily splashing. Not suitable for swimming or hot water baths. Higher quality glow powder keeps the light on longer. Best gift for friends/family/lover/yourself.