It's just the Nunchuk..(doesn't your Wii come with a remote control?) It shows a pic of the remote because the Nunchuk must be used with the remote, it's only $4.99. Below is the ad copy for anyone intersted, I have purchsed many items from the site..it's legit:
Contoured to perfectly fit a player's hand, the Nunchuk builds on the simplicity of the Wii Remote and goes a step further to meet the particular needs of gamers.
The Nunchuk connects with the Wii Remote at its expansion port and is used with it conjunctively. The Nunchuk contains the same innovative motion-sensing technology enabled in the Wii Remote, but also includes an analog thumbstick, greatly increasing maneuverability.
In many games, players will use the analog stick of their Nunchuk to control their characters' movements, and the Wii Remote to perform specific actions, whether tossing a touchdown pass or aiming a weapon in a first-person-shooter game.
In addition to the analog stick, the motion-sensitive Nunchuk contains two buttons for further control options positioned for easy access. Players are free to hold either the remote or Nunchuk in whichever hand they find most comfortable.
Motion sensitive game-play
Continuously variable analog thumbstick.
Two operational buttons
Sleek, comfortable design
Take advantage of the Wii's expandability with two handed gaming
Works together with your Wii remote
Health of Body & Spirit, Chris