There is a Lightning data cable line in the package, which can directly charge the battery case without purchasing separately. Features: 1. This battery case is only fit for iPhone 12 Pro Max, Not works with other model. 2. Long Battery Life: add more than 200% battery life to your iPhone 12 Pro Max. You can going through out the day, essential for traveling, camping, road trips or business trips. 3. 4 LED indicator will show you how much power is left (25%-50%-75%-100%). 4. Full protection to corners and sides, protecting your iPhone from drops and impacts, not including phone screen. How to use: 1. Just fully put your iPhone 12 Pro Max into the battery case. 2. Press 3 second the power button of the battery case, It will start charge your Phone. Press 3 second the power button again, the case will stop charging. 3. This battery case contains a Lightning data cable. When your battery case needs to be charged, you can use it directly. ? Specifications: - Capacity: 12000mAh. - Input: 5V/1A - Output: 5V/1A - Compatibility: For iPhone 12 Pro Max - Charging Power Level: 1 Light = 25%, 2 Lights = 50%, 3 Lights = 75%, 4 Lights = 100% Note: 100% support wireless charging. 100% support CarPlay. 100% support car charger. ?Package Included: 1 x 12000mAh Battery Case for iPhone 12 Pro Max 2 x Tempered Glass Screen Protector 1 x Lightning data cable 1 x User Manual