The Wii Motion Plus is an expansion device for the Wii remote that allows it to capture complex motion more accurately， that is to say， the device has the advantage of providing more comprehensive tracking of arm position and orientation. Your Wii remote need it because it is here for perfecting the remote and your whole gaming world.                                    Features            New motion plus for Wii sports resortPerfect fit silicone case                                                            Specifications            Dimensions    (11.50 x 1.97 x 1.38) " / (29.2 x 5 x 3.5) cm (L x W x H)    <br>Weight    2.93 oz / 78 g    <br>Color    White    <br>Compatible with    for Nintendo Wii / Wii U    <br>                                                            Package Includes            1 x Motion Plus for Nintendo Wii / Wii U White1 x Silicon Case