Wii Remote Motionplus Motion Plus is simple, intuitive and easy to use. 
Connect the Wii motionplus accessory to your Wii remote controller to increase accuracy and enhance play control on compatible games.
Look on the back of Wii game disc packaging to see which games are specially designed for use with Wii motionplus. 
Wii motionplus contains additional sensors that make the Wii remote respond to the slightest movement, motion, or twist of the wrist.
It must be used with a Wii remote, which is sold separately.