Official LG Quick Circle Case NFC , Qi Wireless Charging Flip Case Battery Back Cover CFR-100 for LG G4 (F500) - Gold Easy convenience of wireless charging Unique Circular Window Wakes Up with a Double-Tap with Knock On, Showing a Clock Customize and Use Apps Right From the Window, Choose from Camera, LG Health, Music, Call Logs, App Market, Messaging, or Settings Wakes Your Phone Automatically When Opened Compatible with Qi Compliant Wireless Charging Devices