Porodo Ultra Lumina AMOLED Watch 2.1 Display Double Tap Enabled - Battery 320mAh 3.7V Working Time 7-15 Days Compatibility Android 5.0 And Above iOS 9.0 And Above Charging Time 2-3 Hours Material Watch Case Zinc Alloy Resolution AMOLED 420 x 520 Screen 2.2 Inch Flash Memory 128MB Bluetooth V3.0 V5.0 Sensor G Sensor SC7A20