N4 PWRcard - Qi Wireless Charging Receiver Card Coil for Samsung Galaxy Note 4 IV N4 PWRcard fits discreetly behind your existing original Galaxy Note 4 cover to enable wireless Qi charging with the QiStone+, Koolpad, Koolpuck and other Qi charging pads (Qi charging pad is required to charge). Effortless Charging for your phone. Qi technology can be used with most non-metallic cases and covers under 5mm thick. N4 PWRcard may interfere with NFC & S-View functions of the phone