OUTDOOR ADVENTURE WITH YOU - This military outdoor smartwatch is made of special composite material and sturdy aluminum alloy bezel, which has gone through rigorous military-grade testing and supports heat resistance up to 187.96 °F, cold resistance up to -82.78 °F, waterproof, low-pressure resistant, and dust-proof, fearless of harsh environments, making it the perfect companion for outdoor adventures GUARD YOUR HEALTH - The watches for men monitors heart rate, blood oxygen and blood pressure in real time with high-precision sensors. This rugged fitness watches for men also monitors sleep, such as deep sleep, light sleep and REM, and provides sleep trends for the last seven days, analyzing your health in real time and helping you adjust to a healthy lifestyle.(Note: The health data can only be used as a reference for exercise and cannot be compared with professional medical equipment data) PERSONAL EXERCISE ASSISTANT - The iPhone smart watch has 100+ indoor and outdoor sport modes, customized for those who love to exercise. It records exercise data according to your exercise style, tracks your steps, distance, calories burned, etc., and helps you achieve your fitness goals HANDHELD COMMUNICATION - This smart watches for men is compatible with most iOS 9.0 and Android 9.0 and above. With a built-in hi-fi speaker and microphone, it supports Bluetooth to make and receive calls, receive message alerts, play music and voice assistants, freeing your hands from your cell phone and allowing for freer communication. (If you don't want your cell phone to sound from the watch, please turn off “Media Audio” on the watch) MORE EFFICIENT LIFE - The outdoor sport watches has many built-in functions including weather forecast, music control, camera control, timer, alarm, sedentary reminder, drinking water reminder function, etc. Lift up your wrist and read all the incoming calls, text messages, SNS messages sent to the smartwatch screen directly. There are various dials in the app, you can also customize the dials, it's a perfect choice for men/dad/friends LONG LASTING BATTERY - Ultra-low power consumption, the Android smart watch has a built-in 450mAh battery, which can support 50 days of standby, 7 days of general use with a 2-hour full charge, providing long-lasting power for long outdoor adventures or busy work. If you encounter any problems during use, please contact us through Amazon. Tip: If you keep using the watch to play music or make phone calls, the watch's usage hours will be greatly reduced TIP - If there is any problem with the product feel free to contact the seller's customer service. Order more than thirty days of the product, no matter what the problem, you can contact the seller's customer service