Product Details + Case Material Titanium with DLC (Diamond like Carbon) and Duratect Strap Material Silicon Case Size 48mm Water Resistant 20bar Glass Material Crystal Glass with Anti-Reflective Coating Clasp Type Standard clasp Movement Eco-Drive Power Reserve 11 months Specification Altitude Indication & Calibration Function Compass Indication & Calibration Function World time in 26 cities Date display Perpetual calendar Eco-Drive ( recharged by any light source , No need to change battery) Insufficient Charge Warning Function