Product parameters Appearance size: 45mm*45mm*9.5mm Material: ceramal shell leather silical-gel strap Screen: LTPS retina-level HD screen at 1.3 inches Resolution: 360*360 Battery type: polymer lithium battery Battery capacity: 180 mAh Charging way: magnetic-type charging Charging time: about 2.5 hours Duration: 5-7 days Vibration motor: support Sensor: heartrate sensor, acceleration senson Bluetooth: BLE 4.2 Support equipment: iOS 9.0 and above, Android 4.4 and above Features 1.3 inch LTPS display,Resolution: 360*360 24 hours continue Heart rate detection, Blood pressure , Scientific sleep,HRV?This feature is only available when you turn on scientific sleep.) Time / clock display, step, Multi-sport mode,sleeping, camera, GPS sports, switch on/off display Metal shell + Ceramic circle Sleep monitoring (sleep time, sleep quality, stay up late) Call reminders, SMS reminder, qq reminder,Wechat and other APP reminder. Find the Phone Alarm clock / Sedentary reminder Remote control camera (shake shake to take pictures) PLEASE NOTE: DELIVERY WITHIN 2-8 WEEKS AS MOST OF THE ITEMS ARE COMING FROM ABROAD. IF FOR ANY REASON I CANNOT SHIP TO YOUR LOCATION, I WILL CANCEL WITHIN 24 HOURS. PLEASE NOTE: DELIVERY WITHIN 2-8 WEEKS AS MOST OF THE ITEMS ARE COMING FROM ABROAD. IF FOR ANY REASON I CANNOT SHIP TO YOUR LOCATION, I WILL CANCEL WITHIN 24 HOURS.