Features: 1.PORTABLE AND CONVENIENT: Add extra 6000mAh backup battery to your for IOS 11 Pro Max wherever you go. Perfect for traveling, camping, business trips, or any outdoor scenes. Slim and hand friendly design for easy carrying. 2.UNIMPEDED PORT FUNCTIONALITY: No need to remove the battery case to sync data with any computer. Compatible with for CarPlay. Also supports the earphone that comes with the phone, providing full sound access without removing the battery case. 3.SAFE AND LED POWER INDICATOR: Our battery case with LED indicator light allows you to easily know how much power is available. Press and hold the power button for 3 seconds to start charging. Internal circuit protection ensures safety, preventing overheating, overloading, and short circuiting. 4.FULL PROTECTION: Designed with accurate cutouts for easy access to all ports and buttons. Provides full coverage protection to your mobile phone, keeping your favorite phone from scratch and wear. 5.ENJOY MUSIC AND CALLS: This battery case is compatible with for IOS interface earphones, allowing you to listen to music or make calls through the headphone jack while charging your phone! specification:Item Type: Battery case Material: Silicone Weight: Approx. 195g / 6.9oz Built in Battery: Lithium battery 6000mAh Fitment: Fit for IOS 11 Pro Max PackageList:1 x Battery Case 1 x Manual NotePlease charge the battery case first before using it to charge your phone.