The rugged design of this military-inspired watch is guaranteed to get you noticed. Key features include day-date, luminous hour and minute hands and 100 meter water resistance. Additional details include bold numerals on a khaki dial, stainless steel black ion plating with a black strap, and 42mm screw-back case. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E101. Product Details MODEL BM8475-00F 8/10/2017 MOVEMENT TECHNOLOGY E101 Eco-Drive Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries. BAND LENGTH (MM) 200.025 CASE WIDTH (MM) 42 LUG WIDTH (MM) 22 BAND TYPE Strap Nylon CASE MATERIAL Black Stainless Steel CRYSTAL Mineral Crystal Impact and shatter resistant CLASP Buckle DIAL Black Luminous Hands WATER-RESISTANCE WR100/10Bar/333ft [Swimming, Showering & Snorkeling] ADDITIONAL FUNCTIONS 3 Hand Day / Date