Nintendo have stated that the Circle Pad Pro will be released exclusively through GameStop on the 7th February in the US with a retail price of $20.
The Circle Pad Pro is cited as running for 480 hours on just one AAA battery. The Circle Pad Pro is a comfortable cradle that holds the Nintendo 3DS system while adding an analog Circle Pad on the system’s right side. The attachment also adds additional shoulder buttons to give it a feel more akin to traditional console controllers. It is designed as an optional accessory and is compatible with Resident Evil Revelations and Metal Gear Solid 3D Snake Eater.