Key FeaturesHealth tracker: Pedometer,Heart rate monitor,Sleep monitor,Blood Pressure,Blood Oxygen.Notification type: Facebook,WhatsApp,Twitter,Wechat,QQ,Skype,Line.NRF52832 Chip: features low consumption detailed with high performance, flexible and quickly.Compatability: Android 4.4 / iOS 9.0 and above system.Manufacturer SpecificationsHealth tracker: Pedometer,Heart rate monitor,Sleep monitor,Blood Pressure,Blood OxygenBluetooth calling: Phone call reminderBand material: PU leather/MetalOperating mode: Touch KeySupport language: English, Japanese, Korean, Spanish, German, Italian, French, Greek, Turkish, Russian, Dutch, PortugueseBuilt-in chip type: NRF52832Data Synchronism: download APP named Hey Band to save and sync the data to achieve your healthy goalCompatible OS: Android,IOSAlert type: VibrationMessaging: Message reminderCharging Time: About 2hoursScreen size: 0.96 inchCompatability: Android 4.4 / iOS 9.0 and above systemsOther Function: Bluetooth,Alarm,Calendar,WaterproofBattery Capacity: 170mAhScreen resolution: 96 x 64Product weight: 0.0650 kgAnti-lost: YesWaterproof: YesScreen: OLEDUltra-long Battery Life: it consumes less power and can generally standby for 150 daysCase material: AlloyBluetooth Version: Bluetooth 4.0IP rating: IP67Band size: 26 x 2cmPerfect Personal Health Tracker: sleeping monitor, heart rate monitor, blood pressure monitor, blood oxygen monitor, calorie;NRF52832 Chip: features low consumption detailed with high performance, flexible and quicklyDial size: 3.9 x 3.9 x 1.01cmGroups of alarm: 3 setsProduct size (L x W x H): 26.00 x 3.90 x 1.01 cm / 10.24 x 1.54 x 0.4 inchesType of battery: Polymer Lithium BatteryPackage Include:1xSmart watch1xUSB Charging Cable1xUser ManualWe provide you with the best product and service, if you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much.