iPhone6/6s Battery Case 7000mAh Power Bank External Backup Battery Charger Cover For iPhone6/6s 4.7" (Rose gold) Functions: charge your cell phone anytime and anywhere but firstly you should charge/load this case. Working Principle: pass/transport power from case itself to mobile phones Features: high 7000mah/ Black-White-Gold-Rose gold 4 colors/with stand holder/ NO flip cover/ NO retail package box PC Material:high desity,high hardness,high purity,Environmental, non - poison, non - flammable, endurable to aging, climate, chemicals.