Solu &reg; 3.7v Li-ion Battery Mini USB to USB Power Apply Module 5v 1a Charge Module Usually, you will get it actually in 9~19 days, If you are in the USA and the item is NOT Fulfilled by Amazon. the item will be sent to you by USPS with shipping information from China. The estimated delivery time offered by Amazon is not the real time. Your patience is highly appreciated. Hope you will receive your item soon and enjoy using it. the input interface : MINI USB female port the output interface: standard USB female port About us (Solu ), Professional factory of circuit boards for Arduino With iphone recognition circuit, can charge iPhone Never reverse the connection polarity