This Wii sensor is so much better than the original version. I have a regular Wii and my kitten chewed through the super thin long cord on the sensor. We haven't been able to play the Wii since. At first I was hesitant to get this because I didn't want to pay $20 for it. But I went ahead with the purchase and it was totally worth it. The sensor is wired or wireless. Now I don't have to worry about a long cord getting in the way. The sensor is extended range so where my little girl wasn't hitting the old one properly for her dance games the new one catches her because of the wide range. It also has an automatic shut off so I'm not constantly running through the batteries. My little girl never remembers to turn it off. I am extremely happy with the purchase. With all it can do I would have actually paid more. If you have the old Wii sensor you should upgrade to this one whether you need to or not. You will be truly happy!!!