iPhone 8/7 Battery Case, FOSTO Ultra Slim Portable Charger iPhone 8/7 Charging Case,3100mAh External Rechargeable Power Case for iPhone 8/7 [ Certified Chip, iOS 10+ 4.7 inch] (Black)

Specifications: Capacity: 3100mAh Li-Polymer Rechargeable Battery Dimensions:Length = 0.63 inches x Width = 2.87 inches x Height = 6.05 inches Weight = 3.8 ounces Input Voltage: 5.0V/1.0A Output Voltage: 5.0±0.25V/1A Charging Power Level: 1 Light = 25%, 2 Lights = 50%, 3 Lights = 75%, 4 Lights = 100% Standard microUSB cable (can be used for data transfer for iOS and PC compatible devices such as Macbooks and Laptops to sync music and files to iTunes). Package Contents (Retail Packaging): 1x 3100mAh iphone 8 / 7 Battery Case 1x Dual Layer Bumper 1x Micro USB Cable 1x User Manual