The X-Pro speed controllers are sensorless speed controllers specifically designed for the Hacker Brushless A motor series. Thanks to their various operating modes, these controllers are also suitable for other brushless motors. All speed controllers are ideally suited for the new LiPo cells. In conjunction with the new USB interface, we offer a wide range of adjustment options. Here, not only the number of cells can be set, but also the cutoff voltage in volts per cell. The user can choose when the controller should intervene to protect the LiPo battery from deep discharge. Universal controllers for 5 to 16 NiCd or 2 to 5 LiPo cells cover many application areas. All controllers have the option of timing adjustment in various steps. An automatic timing adjustment is also selectable, allowing the timing (advance) to be optimally adapted to other motors. All settings need to be programmed only once. The controller remembers these settings and does not need to be reprogrammed each time. This programming can be done very easily with the completely new X-Pro USB interface, which offers all possible settings. Settings of the speed controllers can also be read out and saved on the computer. Programming as before with the throttle stick is still available with the familiar options. True speed controllers for helicopters are available in sensible gradations.