This wireless power pack is Qi certified. Simply set your devices with the Qi wireless standard like iPhone 8, iPhone X, S9, S8, Note 9 and Note 8 series on the wireless power pack. The charging will begin immediately. The maximum output power of Qi is 10W. Once the protective case is made of non-metallic material and its thickness is not over 6mm, the wireless charger can also charge the smartphone with most cases.