RolloTron Standard DuoFern 1400 belt winder with a display, a 23 mm belt and a 45 kg tensile force - practical upgrade for conventional shutters Shutters can be controlled quickly and conveniently with the RolloTron Standard DuoFern belt winder, which can be controlled remotely by radio and also has an intuitive manual interface. The belt winder is suitable for flush-mounting in common belt boxes with a width of 3.6 cm or more, so that it can be retrofitted almost anywhere as a shutter drive. In conjunction with the HomePilot® central control unit or other DuoFern devices, a variety of functions can be accessed - for example the choice between a daily, weekly or astro programme, as well as the random function to simulate presence. The ventilation and sun protection position can also be set as you wish. In addition, the radio-controlled belt winder has a material-protecting soft-start/soft-stop function that ensures that the shutter runs smoothly and without an abrupt acceleration. Func