Product Name: KiwiwatchWatch size:44mm: 44*38*10.8mm / 40mm: 41*35*10.8mmWatch color:Color: Black, Silver, Rose goldStrap size:44mm: Fit 42/44mm straps / 40mm: Fit 38/40mm strapsScreen size:44mm: 1.75inch / 40mm: 1.58inchScreen:HD IPS, 320x385 Pixels2.5D Curved full touch screenCompatible system: IOS / Android SystemApp: Wearprochip: Realtek 8762DKHeart rate sensor: BD1662android system: Support Android 4.4 and aboveios system: Apple IOS8.0 or aboveBluetooth: Bluetooth 4.0+3.0Waterproof level: IP67Product Process: Zinc alloy/PC plasticscreen size: 1.75Screen Resolution: 320*385Screen type: LTPS LCD screenScreen material: glassWristband material: Silicabattery style: Lithium batterybattery voltage: 3.7Vbattery capacity: 280mAhBattery life: The normal connection is used for 3 days, and the standby is 5 days. (This is labotary data, actual Using depends on personal usage)charging method: MagneticCharging time: About 2 hoursCertification: FCC ID, CE, ROHS, battery certificationAPP support language: Chinese, Vietnamese, English, Italian, Hebrew, Spanish, Turkish, Thai, Japanese, Portuguese, Czech, Korean, traditional Chinese, French, Russian, German, Persian, Polish, ArabicDevice side support language: Simplified Chinese, English, German, Russian, Portuguese, Spanish, Japanese, Korean, Vietnamese. Arabic, Thai, French, Italian, Polish, Persian, Greek, Danish, traditional Chinese, Latin, Romanian, Turkish, Hebrew, CzechManual Languages: Chinese, EnglishFunctions: Breathing training, dial push, stopwatch, brightness adjustment,multi-sport mode, sleep monitoring, heart rate, Blood oxygen, message, remote music, remote photo, weather, search for mobile phones(use with mobile phones), Bluetooth calls, Bluetooth music playback, password protection, calculator, split screen display, Shortcut widgets, Menstrual monitoring, massagerPacking:smart watch*1 / charging cable*1 / user manual*1 / original retail box*1