Calibre No.E660 Maximum run time from full charge (Normal Use Condition): Approximately 6 months Movement: Eco-Drive Signal Reception: Global Radio-Controlled Strap: Stainless Steel Water Resistant to 20 bar Case Thickness13mm Case Size : 42.6mm Case: Stainless Steel Surface Processing: IP Black Glass: Sapphire Glass (Non Reflection Coating) 3 years warranty 24hrs, Date & Day Display Alarm Eco-Drive (recharged by any light source, no need for regular battery replacement) Insufficient Charge Warning Function Overcharge Prevention Function Power Reserve Indicator Power Saving Function Global Radio-Controlled Perpetual Calendar Chronograph