Rugged Design (resistant to extreme temperatures (-40°C to 70°C). Up to 20 days of typical usage. Peak Brightness: Up to 1,000 nits. WLAN: 2.4GHz. Dual-band GPS with support for six satellite systems. 10 ATM Water Proof . 24/7 tracking of heart rate, blood oxygen, stress levels, and sleep quality. 160 sports modes. Offline maps, route tracking, and real-time navigation capabilities.