These Samsung Wireless Charging Pads for Qi-Enabled Devices (model PG920IBUGUS) drop from $49.99 to $17.99 to $13.99 using our exclusive code BRADSQI at iTechDeals.com. Plus, the shipping is free. This is the lowest price we could find for one by $10. They're compatible with any smartphone with Qi wireless charging built-in, like the Samsung Galaxy S6 and S7. They also work with any wireless charging case labeled as "Qi enabled." You can look up whether your phone is compatible with these pads or whether you'll need to purchase an additional accessory in order to use them at Qi's website. You can then find any necessary accessory on Amazon. A power block is not included since they'll work with the one supplied with your phone and there is no sales tax.