We bought a hoverboard from Rolab for our daughter for Christmas. We tried charging it three times, but it didn't work. I have tried calling Rolab on the number advertised on their website, and the number does not work. I have tried e-mailing them, and have also filled in the on-line contact form. I have had no response from them. I am £140 out of pocket and have a very disappointed daughter. I would not recommend Rolab our their products.