Calibre No.B620 Maximum run time from full charge (Normal Use Condition)Approximately 9 months MovementEco-Drive Signal ReceptionWithout Radio Reception Function StrapCalf Leather Strap Water ResistantWater Resistant to 10 bar Weight92g Thickness12.9mm Case Size 43mm CaseStainless Steel GlassCrystal Glass Warranty3 years warranty Specification 24hrs and Date Display Chronograph Eco-Drive (recharged by any light source, no need for regular battery replacement) Insufficient Charge Warning Function Overcharge Prevention Function