Porodo Zebro Smart Watch Black Dial Black Silicon Strap Metal Strap - Watch Case Zinc Alloy Screen Size 1.43 Inch Screen Resolution AMOLED 466 x 466 Flash Memory 128MB Charging Time 2-3 Hours Working Time 2 to 3 Days Bluetooth 5 to 7 Days Without Bluetooth Battery Capacity 260mAh Lithium Polymer G Sensor SC7A20E IC Sensor Tianyi Hexin 3605 Bluetooth V3.0 V5.0 Water Resistant Level IP67 System Compatibility Android 5.0 And Above iOS 9.0 And Above