Voice Assistant Built-in:YesBluetooth-compatible Version:5.0Metrics Measured:Heart Rate , Oxygen ,sleep , Pressure Activity Tracked:Steps ,distance ,calorie ,activity Category:Smart WatchesScreen Material:AmoledBand Detachable:YesApp Download Available:No Detachable:NoDisplay Size:2.2 InchMovement Type:ElectronicStyle:FashionApplication Group: Screen Shape:SquareCase Material:AlloyBand Material:Silica GelWaterproof Grade:Professional Waterproof Available:NoMechanism:YesMultiple Dials:YesGps:YesNetwork Mode:None :>450mahRear Camera:NoneRam:4gbRom:64gbSystem: Wear,proprietary Os, Os,iosType:On WristCompatibility:IosLanguage:English, ,spanish,polish,portuguese,turkish,italian,french,german,norwegian,ukrainian,hebrew,dutch, ,indonesian,greekFunction:Passometer,fitness ,sleep ,message Reminder,call Reminder,answer Call,dial Call,remote Control,push Message,24 Hour Instruction,chronograph,alarm Clock,heart Rate ,interactive MusicOrigin:Mainland Certification:None 1:Heart Rate Monitoring 2: Pressure Band 3:Control Music 4:Bluetooth Call 5: Waterproof Watch 6:Fitness Watch 7:Sleep 8:Men Women 9:For Series 10 10 Ultra 10:For 10 Ultra 11:Smartwatch 12:Smartwatch :SupportFast Shipping:SupportDrop Shipping:Support