Product Details + Case Material Stainless Steel Strap Material Calf Leather Case Size 46mm Water Resistant 10bar Glass Material Crystal Glass Clasp Type Standard Clasp Movement Eco-Drive Power Reserve 7 months Specification 1/5 second units chronograph 60 minute timing 24 hrs display Date display Eco-Drive ( recharged by any light source , No need to change battery) Insufficient Charge Warning Function Overcharge Prevention Function