[【Military-grade Smart Watch】The OUKITEL BT20 Rugged Smartwatch passes the waterproof test and will not be damaged even in 50 meters of water. The case of the BT20 is made of aerospace-grade metal and the screen is made of rugged and unbreakable Corning Gorilla Glass it not only withstands drops and shocks but can also be used in extreme environments down to -40°. making it the perfect companion for outdoor adventures such as climbing diving skiing crossing deserts glaciers or jungles 【Bluetooth Calls and AI Voice Assistant】The OUKITEL BT20 Smart watch adopts Bluetooth 5.2 technology which ensures stable transmission and fast response. With the Bluetooth call function you can receive and make calls and it also supports synchronisation of phone contacts and call logs. You can also use the voice assistant function to make the smartwatches work for you anytime anywhere 【Charge Once and Use for 15 Days】The OUKITEL BT20 Rugged Smartwatch has strong endurance with a high-capacity 350 mAh battery that can last for 15 days. The newly updated smart battery system has high temperature and high voltage protection and smart optimisation for usage scenarios. Magnetic charging function one-touch charging very fast and convenient 【24H Health Monitor】The Oukitel smartwatch has a built-in optical tracking sensor that automatically monitors healthy levels for 24 hours monitors sleep status at night and records total sleep time. After daily synchronisation of the watch data via the "Mobile APP" you can view further health data to help you analyse your health status and make appropriate adjustments in good time 【100 Sports Modes】The fitness watch supports treadmill jogging cycling walking outdoor training skiing swimming and other training modes. You can also view the complete training data in the "APP". By connecting to your mobile phone\s GPS you can track all training routes distances and fitness during training 【Experience a Convenient and Smart Life】This smartwatch also has other practical functions such as: Message notifications (SMS WhatsApp Instagram Facebook etc.) incoming call notifications music control camera control weather forecasts alarms session reminders etc. giving you a smarter experience]