The Powermat PMM-2PB-B32 Wireless Charging Mat is a lot of two charging mats that come with a PowerCube and an Apple Dock. The mats are compatible with Apple devices such as iPhone 3GS, iPhone 3G, and iPhone 4s. The wireless charging feature allows for easy and convenient charging without the need for cords. The Powermat wireless charging standard ensures compatibility with other Powermat products.