New Dual OTG USB Sync Battery Charger Dock Holder For Samsung Galaxy S4 SIV I9500 Cargador Chargeur White Provided with charging and OTG function Can charge the battery and the phone at the same time. Dock station design, can steadily support the device, providing the users with suitable viewing angles. Made of high quality material, adopting precise design, exquisite workmanship and elegant appearance. OTG port provides a simple way to connect phone to a USB enabled computer for data synchronization and file transfers.