ABC&reg; Qi Wireless Charging Receiver Pad+Battery Cover Kit for Samsung Galaxy Note 4 (White) QI receiver in the back cover . High quality 2 in 1 wireless charger receiver + case cover for Samsung Galaxy NOTE 4 SM-N910 Charging Voltage/Current: DC5V/500mA-750mA Working Frequency: 100-200 KHZ Input Voltage/Current: DC5V/1A