How Wii Controllers Connect: Bluetooth Wireless Technology Explained
Wii Remotes (and Wii MotionPlus) connect to the Wii console via Bluetooth 2.0 (HID profile).
Key Details
Wireless Freedom: No cables; ~30 ft range.
Sensor Bar: Not for data—it emits IR LEDs the remote's camera tracks for pointer functionality (on-screen cursor). The remote sends pointer coordinates via Bluetooth.
Pairing: Sync button (red, under battery cover) + console's front SD slot button.
Power: 2x AA batteries (or rechargeable packs).
Classic Controller, Nunchuk, and other attachments plug into the remote's expansion port—they communicate through the remote's Bluetooth link.