It offers you the guidance and data to help you get stronger and essential smartwatch features to keep you connected. Its case is made from carbon fiber reinforced polymer, therefore, it is strong and durable enough to withstand any external environment conditions. With Stratos, if you exercise outside for 3 hours every day, it is able to provide you with 25 days of endurance under the smart watch mode. Stratos is for you wherever and whatever you are doing.