?PLEASE NOTEThis iPhone Xs Max battery case only suit for iPhone Xs Max (6.5 inch). Not work for iPhone X ,XS,XR Not compatible with iPhone lightning headphone or traditional 3.5mm headphones. ONLY works with Apple Airpods or other wireless Bluetooth headphone.? ?Long Battery Life: The powerful 7800mAh built-in lithium polymer iPhone Xs Max Battery Case add more double battery life to your iPhone. You can going through out the day, do not worry the battery run out suddenly. ?Advanced Sync-through TECHNOLOGY:Amazing sync-through technology that you can simultaneously charge your iPhone Xs Max and iPhone Xs Max battery case together ,conveniently sync your iPhone Xs Max to your MacBook, PC or laptop without having to take the battery case off. ?CHARGING & PROTECTING 2 IN 1:This iPhone Xs Max Battery Case with 360scratch-guard, can protect your iPhone from scratches and other daily wear and tear. Internal high quality chips also protect your smart phone from overheating, short-circuiting and over charging. ?What you will Get7800mAh Battery Case for iPhone xs max x1 , User Manual x1. Our?have worry-free?24 month?friendly?customer?service, Any?question, Please?kindly?contact?us.