S9 1.53 inch Color Screen Smart Watch, Support Bluetooth Call Heart Rate Blood Pressure Blood Oxygen Monitoring About Product: 1. Battery capacity: 300mAh 2. Bluetooth version :BLE 5.0 3. Charging method:magnetic charging 4. Resolution:360 x 360 5. System: Android system 5.1 version or above,iOS system 8.0 version or above 6. APP: LookFit 7. APP support languages: English, Simplified Chinese, Traditional Chinese, Dutch, Russian, French, German, Portuguese, Spanish, Türkiye, Polish, Arabic, Malaysian, Thai, Japanese, Korean 8. Watch support languages: Simplified Chinese, Traditional Chinese, Japanese, Korean, English, French, German, Italian, Dutch language, Portuguese (Portugal), Spanish, Swedish language, Czech language, Danish language, Polish language, Russian, Turkish language, Hebrew language, Thai, Hungarian language, Romanian language, Arabic, Vietnamese language, Tibetan, Hindi Parameters: 1. BT headset chip Dor: bluetrum 2. BT headset chip model: AB5376A2 (5V automatic switching) 3. Incoming call: Take out double click to answer Dual headphones: listening to songs in stereo Single headphone: single channel listening Average power consumption for listening to songs and phone calls: Approx 10mA (low-power version) 4. Battery Capacity: 25mAh 5. Headset charging mode: Put in the bracelet to charge Function 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Message push, daily alarm clock, photo control 5. Bluetooth dual earphone call, sedentary reminder, find phone, find bracelet