It relies on solar energy to change the gears

5" (40MM) molded neoprene ankle cuff

Only the Japanese quartz movement technology is affected by this

The sunray grey dial is hand set with 11 diamonds for both the look and feel of a luxury watch

Material: Nylon+ leather

Seiko Men's Prospex Black Dial Silicone Band 45mm Stainless Steel Watch - SRPE93 Brand_SEIKO It relies on solar energySeiko Men's Prospex Black Dial Silicone Band 45mm Stainless Steel Watch SRPE93. The Seiko PROSPEX Collection, a cult favorite among watch enthusiast from all over the world combining durability with sporty style. The SRPE93 automatic dive watch has a 45mm brushed and polished stainless steel case with a matte black dial. The black rotating uni directional 120 click elapsed timing bezel is well suited for professional diving with a 200 meter water