Specifications: Compatibility: for Samsung Galaxy Note4 9100 Color: Black Product standard: Qi Input: DC 5V Output: 800mA Power distance: 4~8mm Size: Approx. 8 * 5cm \/ 3.2 * 2in Weight: 5g \/ 0.1oz How to use it: Step 1: Open the back cover of your phone; Step 2: Stick the receiver card to the mobile phone's battery and the protuberant touch points must touch the recesses next to the battery; Step 3: Close the back cover; Step 4: Place the mobile phone onto the Qi wireless charging pad (the phone and the Qi wireless charging pad are not included). Note: The receiver needs to work with the Qi wireless charging pad Package List: 1 x Qi Wireless Charging Receiver for Samsung Galaxy Note 4 N9100