Galaxy Note 4 Wireless Charging Back or S View Case
Samsung doesn't build wireless charging in to the Galaxy Note 4, but you can buy a Galaxy Note 4 wireless charging back or wireless charging S View cover for Galaxy Note 4.
Both of these options snap on to the back of the Galaxy Note 4, replacing the stock back and addign Qi wireless charing. You'll need a Wireless charging pad to make this work, which will add $20 to $50 to your purchase.
MobileFun offers the Galaxy Note 4 wirelesss charging back in white and navy for $41. This is due in stock within a week.
They also sell the Galaxy Note 4 wireless charging S View cover case for $60.99 in a variety of colors with stock expected within a week.