Specification: Device RS4 Shape Rectangular Dimension 45.2*37.2*11.1mm Weight 48.6g Colors Black Display IPS Screen Size 1.78 Inch Screen Resolution 368 x 448pixels Compatible Os Android & IOS Sensors Heart rate Sensor G Sensor Bluetooth V5.1 GPS No NFC No Bluetooth calling No Multi-sports mode 12 sport modes Heart rate monitor Yes Blood Oxygen monitor Yes Blood pressure monitor NO Waterproof IP68 waterproof Additional Features Sedentary reminder Sleep monitor Alarm Barometer Brightness Adjusting .etc Battery Capacity 230 mAh Normal Usage 7-10 days App name Haylou Fun Strap Silicone -----Haylou RS4 LS12 Smart Watch Beauty on Your WristExactly What You Want12 workout modes / 1.78" AMOLED HD display / Customized Watch Face / 10 days battery lifeIP68 waterproof / SpO2 tracking / Heart rate monitoring / Sleep monitoringDesignAMOLED HD Display1.78" AMOLED HD display brings an unprecedented clearness in details with lower power consumption and faster response speed, making every screen-on stunning to look at.-368*448 resolutionUltra-high resolution and faster response speed-Large-size screenClear and stunning-AMOL ED HD displayDelicate and fine texturedCreative Strap DesignThe Lightweight metal bezel is designed with a technological aesthetic. And the upgraded silicne strap is skin-friendly and breathable for a long time wearing.-Exquisite metal bezelGorgeous looking-48.6g lightweight designSlim and pressure-free-Creative design without a hoopStylish and easy to wearNew Look Whenever You WantThe APP watch faces are constantly updated. Customize the watch face with images of your choice, or even your own personal picture.HealthBlood Oxygen TestingSleepiness and fatigue after high-intensity exercise or work is a sign of insufficient oxygen in the body. Raise your wrist to test your blood oxygen level and keep your health under control.* Monitoring data and results are for reference only, not for diagnosis.Heart Rate MonitoringHaylou RS4 can accurately detect your heart rate 24 hours a day and detect even slight change, welly knowing your every heartbeat.* Monitoring data and results are for reference only, not for diagnosis.Sleep MonitoringThe percentage of deep sleep is an important criterion of sleep quality. Haylou RS4 actively monitors sleep time and status to help you develop good sleep habits.Breathing TrainingPerform guided breathing exercises at a set rhythm to alleviate stress anytime and anywhere, easily restoring vitality.Workout12 Workout ModesHaylou RS4 has 12 workout modes. It can record real-time exercise data, helping you track and improve your athletic performance.-Go wild and break boundariesCycling / Climbing / Fast walking / Outdoor running-Sweat and keep fitSpinning / Indoor running / Yoga / Free training-Burn youth and record loveBasketball / Football / Rowing / GymnasticsActive Tracking of ActivitiesWith a built-in high-precision motion sensor, Haylou RS4 can actively record your daily exercise behavior. Set your goals and strive to realize them.-DistanceThe watch knows how far you have gone.-StepsEvery step counts check in with small goals.-CaloriesMonitor calories burnt for scientific body management.-Sedentary reminderA timely reminder for a break so you can combine work and rest.LifeAlipay Offline PaymentThe watch supports Alipay offline payment. Forget to take your phone and wallet? Swipe left on the homepage to enter the scanning code page, raise your wrist to make the payment.10 Days Battery LifeBattery life can last up to 10 days in daily use mode, and it can be used for about 25 days in basic use mode, saving the trouble of daily charging.-10 days Daily use mode-25 days Basic use mode* Daily mode: heart rate monitoring; sleep monitoring; call reminders twice a day; message reminders 8 times a day; wrist-lift 150 times a day; exercise twice a week, run for 60 minutes each time.* Basic mode: default watch face; sleep monitoring; turn off phone Bluetooth connection, continuous heart rate monitoring, and other functions.Real-time Message ReminderConnect to mobile phone via Bluetooth. Calls, WeChat, and various APP information can be synchronized with the watch in real-time so that you don't miss every important moment.IP68 WaterproofThe Haylou RS4 watch is IP68 waterproof. There is no need to take off the watch when washing your hands, and you can easily cope with sweating during workouts or stormy rains when you are out.* Meet the requirements of IP68 protection level of IEC 60529:2013 standard. It can meet daily waterproof needs and be worn and used during workouts (can be exposed to sweat), rainy days, and handwashing; do not wear for swim, shower, sauna, surfing, and other high-speed water activities. Damage caused by immersing the device in liq