Nuu and its distribution partner Noetic have launched the Nuu MiniKey for iPhone 4 in North America, a few months after unveiling it in Europe. The case adds a slide-out physical keyboard to the iPhone via a Bluetooth connection, leaving all functions and connectors unblocked. Unlike most other similar cases, the MiniKey works with the iPhone's own antennas, uses keyboard backlighting and automatically goes to sleep when the iPhone enters standby mode.