The Wii Wireless Adapter for Wii Nunchuk controller, as it's so eloquently called, connects to your current nunchuk, untethering you from that not-always-necessary Wii Remote (or simply preventing the cable waggle). It's powered by two AA batteries and is available from Brando for $20. It's not the first wireless nunchuk we've seen, but from the looks of this one, it could help direct your finger to that hard-to-find Z button.