... power bank for phones 1.Description:Item:power bankMaterial:Lithium polymerApplicable for Iphone4/4sSTANDBY TIME420HFunctions:1,protection 2,charge ... best service.4. Mobile power with speaker5.Use to Promotion , gifts, AD, Shop, SuperMarket.5. USB cable6.Delivery methods: ... Air,Ocean,DHL,FEDEX,UPS,TNT,EMS etc. Factory Power power bank for phones with Speaker .Features ...