BrandZeblazeBluetoothBLE 5.3Charging InterfaceMagnetic ChargingApp SupportFitCloudPro AppModelVibe 8MaterialCase: Stainless Steel | Button: Stainless Steel | Buckle: Stainless Steel | Strap: Durable & Comfortable FluoroelastomerCompatibilityAndroid 5.0 or iOS 10.0 and aboveDimensionsWidth: 49.2 mm | Height: 49.2 mm | Thickness: 13.6 mm | Strap Width: 22 mm | Wrist Circumference: 130 - 235 mmCharging timeApprox. 1.5 hoursDisplay1.43" Ultra HD AMOLED | 466 x 466 pixels, 326 PPI | Up to 1000 nits | Always On DisplaySweat & Water Resistance5 ATM & IP69K Water ResistanceFeaturesBluetooth Calling, 300+ Cloud Watch Faces, Custom Photo Watch Face, 100+ Workout Modes, Built in FlashlightSensorsWrist Heart Rate Monitor | Pulse Ox Blood Oxygen Saturation Monitor (SpO2) | Proximity Sensor | AccelerometerBattery Type500 mAh Li-PolOther Features / InfoOperation temperatures: -20°C ~ 55°C | Compatible With Standard 22 Mm Quick Release Watch Bands | Built in Speaker And Microphone for Calls | 316L Stainless Steel | Unibody Durable Sapphire Lens | 70°C Heat Resistance | - 40°C Cold-resistant | 240 H Humidity Resistant | Shock-resistant | Ice & Freezing Rain Resistant | 96 H Salt Spray ResistanceBattery LifeTypical Usage Modes, Up To: 30 Days | Heavy Usage Modes, Up To: 18 Days | Continuous Voice Calling: Up To 573 Mins 