This sloped wireless charger is designed according with ergonomic standard. Especially, it has three-ring circuit, which can enlarge the contact surface with your phone, then accelerate the charging speed. Please note that if you want to charge your iPhone, then a receiver is needed. Main Features: Big enough contact surface to charge, so do not need to put your Phone on it deliberately. Sloped surface accords with ergonomics theory, more comfortable to use. Perfect angle for you to operate your phone, sach as watch videos and play games. Creative three-ring circuit can accelerate the charging speed. Easy to use and to carry, lightweigt and durable.