SUUNTO M3 - Manual (Page 21)

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8. TECHNICAL SPECIFICATIONS
• Operating temperature -20 C to + 50 C / -5 F to 120 F
• Storage temperature -30 C to + 60 C / -22 F to 140 F
• Weight 60 g
• Water-resistant 30 m/100 ft.
• Mineral crystal glass
• Aluminum case
• Replaceable battery CR2032. The battery life expectancy is approximately 12
months.