Citizen Promaster Drive Specifications Model EO2020-08E Dial Black Luminous Hands and Markers Case 36.5 mm Silver-Tone Stainless Steel Lug 18 mm Band Strap Polyurethane Buckle Crystal Mineral Crystal Impact and shatter resistant Water-Resistance 200M/20Bar [Scuba Diving] Weight (G) 65 g Movement E168 Eco-Drive Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries.