Battery Case material from the World's Top supplier (lithium core from LG ABS + PC from Bayer power connector from Apple) not only that it is through international certification systemMFI  CE  FCC  ROHS).To ensure that the product life more long-lasting durable and safe.</br>4000mAh Extra Battery.145% Longer Battery Life:Business trips traveling and working no longer need to bring large and heavy power bank . Fully charge the iPhone 6 puls within 2 hours.4000mAh capacity provides an extra 76 hours audio 23 hourstalktime 13 hours video 12 hours web browsing or 4 hours 3D gaming to your iPhone 6 Plus /6s Plus.</br>Apple MFi Certified: Synching with iTunes. Complete charge and sync compatibility with the iPhone 6s/6s Plus..Transfer data or charge phone using the included Micro USB cable (no need to remove battery case)</br>Niubity Battery Case can relieve your carry-on bag you don't have to take usb cable power bank phone case Incredibly Slim: This case more than doubles your iPhone's battery life without doubling its size (adds only 0.3in & 4.6oz). 100% matching cell phone will not fall off</br>High-end style.When you open the package?? you will be surprised that it is so delicate. Assembly is very simple.Strong&durable engineering material product your iphone 6 puls from bumps&scratching. In addition to the product's own frame??. We give an additional frame (free)(random colors):).</br></br>Product Descript