Excellent watch, I use it like this. The charge lasts 4 days. It has GPS. The watch is designed to withstand the harshest environmental and physical conditions: ​Manufacturing materials: Titanium frame (aerospace grade) to combine lightness with superior toughness, and scratch- and shatter-resistant Sapphire Crystal glass. ​Size and design: A large 49mm screen provides clear visibility of complex data, with prominent side buttons for control while wearing gloves. ​Resistance to harsh conditions: * Heat: Works efficiently in temperatures ranging from -20°C to 55°C. ​Pressure: Water-resistant up to 100 meters (suitable for technical diving). ​Battery and endurance: A huge battery lasts up to 60 hours in active tracking mode (GPS) and up to 30 days in normal watch mode. ​Additional features: Emergency siren (up to 80 decibels), and dual-frequency GPS system for accurate positioning in forests or mountains. Second: Speaker specifications (sports and field performance)