COROS Vertix 2 GPS Adventure Watch Colour:Obsidian Unbeatable weather defense and ankle Unbeatable weather defense and ankle support that's second to none EU US S 38–39 7–8 M 40–41 8 Dual Frequency GPS: It communicates with all five major satellite systems simultaneously and offers Dual Frequency—an express lane for superior accuracy Wi Fi® Accessory Connection Bluetooth® Memory 32GB Satellite Chipset All Satellite Dual Frequency GNSS Chipset Sensors Optical Pulse Oximeter Optical Heart Rate Sensor Electrocardiogram Sensor Barometric Altimeter Accelerometer Compass Gyroscope Thermometer Water Resistance 10 ATM Working Temperature 22°F to 122°F ( 30°C to 50°C) Storage Temperature 22°F to 140°F ( 30°C to 60°C) Charging Time Less than 2 Hours Map Navigation Support Global Offline Street and Topographical Maps Touchscreen and Digital Dial enabled Breadcrumb Navigation Checkpoint Back to Start Elevation Details Distance to Destination GPS MGRS Coordinates Storm Alert Music Support Internal Storage and Bluetooth Headphone Streaming for Offline Content Music Format MP3 Supported Workouts Run