【PROVIDE 125% EXTRA BATTERY LIFE】The powerful 3800mAh Li-polymer rechargeable battery can effectively provide 125%+ extra battery life to your iPhone 7Plus/8plus, which is equivalent to add 13+ hours talk time or 10+ hours web browsing time and equipped with power level indicator LED lights. 【Compatible with Lightning Headphone,Bluetooth Earphone,Lightning Cable & traditional 3.5mm headphones】The iPhone 7Plus/8plus External Battery Case has two openings for the jack extender. And it is compatible with the original lightning headset and traditional 3.5mm headphones , you may play music & charge your iPhone 7Plus/8plus simultaneously. 【Not only a battery case, but also a simplified Bluetooth receiver.】If you have the 3.5mm Audio Cable / Auxiliary Cable，one side connect with the AUX jack and one side connect with the iPhone 7Plus/8plus battery case ,after that open your phone Bluetooth and connect the Bluetooth named 'IP7' ,then you can listen the music.(It can be used for wired headphones, wired speakers, and cars with AUX jacks.)