Right on time: Complete 4-month power reserve with only a 5-hour outdoor or 2.5-day indoor charge. Case made with at least 50% recycled stainless steel.  DIAL 24-hour inner track and K1 crystal, for its superiority of being scratch and shatter-resistant DESIGN Hidden crown for a sleek look, Swiss luminous minute hands, hour hands and Arabic indexes Specifications Case Size: 37MM Movement: Solar-Powered Three Hand, Power Reserve: 4 month battery power from full charge Platform: GRENEN SOLAR POWERED Strap Material: Stainless Steel Mesh Strap Color: Midnight Case Water Resistance: 3 ATM Case Material: Stainless Steel Case Color: Midnight Dial Color: Ocean Blue Strap Width: 22MM Closure: Safety Mesh Buckle Strap Inner Circumference: 200+/- 5MM Crystal Type: K1