i looked at all the product reviews for a wireless nunchuck, there are loads that are not good or so and so, when i found this one (after a long search on Amazon) i realised that to work with a motion plus controller that the unit that plugs into the controller needed to be of a different shape to the motion plus block, ie if it has the same two little snap in lugs then it would plug into the controller and take the place of the motion plus unit and thats not correct. this unit plugs into the motion plus block that plugs into the controller. bingo, a 2.4 gh bluetooth unit that comes with the wireless nunchuck, the nunchuck is the same size as the standard one and it works and feels the same, it has a rechargeable lithium ion battery that i charged up via my PC USB socket (you have to turn the nunchuck on for it to charge) you then turn on the controller and then plug in the small unit into the back of the motion plus block, the blue light comes on and you then turn on the nunchuck, a blue light comes on at the rear of the nunchuck and you then press the sync button and away you go, batterys seam to last well and the best thing is that you can rearly get into the games with out tugging the nunchuck or controller all over the place, fantastic peace of kit and cheap to. i wrote this peace as i am realy pleased with my choice, delivery was as expected as well. product No. asin B004E4JUSQ.