RLX Red Slim Battery Charger Case Model iPhones SE/8/7/6 4000mAh RLX Slim iPhone Battery Charger Case, Featured Lightning port.How to use the battery case?1. Connect the iPhone lighting cable with the battery case, to charge the backup cover.Four LED lights indicate the corresponding power of the battery.0-25%: 1 LED 25%-50%: 2 LED50%-75%: 3 LED 75%-100%: 4 LEDThe LED lights will flash when the case itself is charging, but do not flash when the case charges the iPhone.The LED indicator will stop flashing when the battery is fully charged.2. Remove the top magnetic cover, and then push the phone into the charging port to fit completely, without leaving a gap, to complete the installation.3. Press the smart switch for 3 seconds to charge the phone; press the smart switch for 3 seconds to stop charging the phone.IMPORTANT NOTES:1. This battery case is ONLY compatible with iPhone.2. This battery case does NOT support wireless charging and fast charge.3. This battery case supports Apple CarPlay for series 11/12and 13. 4. This case charger is NOT designed for screen protection. Please use the screen protector as needed.5. Use MFI certified or the original charging cable to charge & Sync your iPhone for better performance.6. Please notice the angle while installing and removing the battery case.PRODUCT SPECIFICATIONS:Capacity: 4000mAhInput/Output: 5V/2A(MAX) Time of Charging case: about 4 hours New In Package Smoke Free and Pet Free Home