Case Material Stainless Steel Strap Material Stainless steel Case Size 44mm Water Resistant 20bar Glass Material Sapphire Glass with Anti-Reflective Coating Clasp Type Fold Over Clasp with Hidden Double Push Button Movement Eco-Drive Power Reserve 8 months(in power saving mode) Specification Perfex Regular automatic reception function 5 Bands Global Radio controlled watch World time in 26 cities Perpetual calendar Alarm 24 hrs display Day and date display Eco-Drive ( recharged by any light source , No need to change battery) Insufficient Charge Warning Function