Product parameters Color: Silver finish, black tape Material: Zinc Alloy Shell,Plastic + Environmentally Friendly Silicone Strap Type: 1.28-inch pure circular color display; resolution 240*240 pixels Operation mode: touch + key Communication method: no card inserted Bluetooth: BLE 5.0 Call Bluetooth: BLE 3.0 Waterproof grade: |P67 Main control chip: HS6621. 128M flash memory, Zhongke call chip Accelerometer: SC7A20 Heart Rate Module: |SC7R30. 128KB+1M. Red light + green light module supports dynamic heart rate/blood pressure/blood oxygen detection Motor: built-in, vibration reminder Charging method: Magnetic charging cable Battery capacity: 260mAh (polymer lithium battery) Charging time: about 60 minutes Working time: 5-7 days Standby time about 30 days Product weight: 140 (g) Appearance size: 260+46+11mm (total length of the strap, diameter and thickness of the case)Features Main functions: split screen, password lock; answering, making calls; supporting mobile phone connection to watch, answer and listen to songs; heart rate monitoring; blood pressure/blood oxygen monitoring; sleep monitoring; exercise pedometer, calorie consumption, exercise time; call reminder and display; Message push and display; remote photo; automatic heart rate test; multi-sport mode; sedentary reminder; alarm clock settingStandby interface: 5 kinds of dials by default, APP can customize the selectionAPP support language Chinese, English, Chinese [Traditional], Japanese, Korean, French, German, Russian, Polish, Spanish, Portuguese, Dutch, Arabic UI Support Language Chinese, English, French, Spanish, Portuguese, Russian, Polish and other 23 countries Information push support language Chinese, English, French, Spanish, Portuguese, Russian, Polish and other 23 countries Support mobile phone system Android 44 and above 4.4, IOS8.4 and above 8.4packing list 1 watch, 1 charging cable, 1 manual