Have for my cats bought this mouse was a bit surprised when unpacking. First you have to give 2 batteries in the remote control, which is still normal. Then you should put the mouse on the lower pole and push gently until it snaps into place. the first time one is a bit scared and still needed for this operation have a few minutes. At the 2nd time off you better. The mouse should be at least 1 minute be so charged and then you could use it. With me only was nothing. At the Second charging she stirred something. After 5 load times they drove really good going on for 30 seconds, then it was all over again. My cats saw the mouse on the station more time than on the ground. Did they then sent back. Great idea, but the implementation leaves much to be desired. A tip to the manufacturer; Why can not the mouse to charge into an electrical outlet with an adapter possibly? And of course, has a slightly larger battery to with purely. Too bad, the mouse would have been well received found, even without engine. But for that it is too expensive.