FOSTO iPhone 7 Plus/8 Plus Battery Case, Ultra Slim Portable Charger iPhone 8 Plus Charging Case,4000mAh External Rechargeable Power Case for iPhone 7 Plus/8 Plus [Certified Chip, iOS 10+ 5.5 inch]

Specifications: Capacity: 4000mAh Li-Polymer Rechargeable Battery Dimensions: Length = 4.375 inches x Width = 1.75 inches x Height = 7.5 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 4000mAh iPhone 7 Plus/8 Plus Battery Case 1x Dual Layer Bumper 1x Micro USB Cable 1x User Manual