Honestly: the Gigaset Repeater 2 is a joke product. The repeater function is completely inadequate and the range with the repeater is no better than without the device. Even at short distances, the network extension does not work adequately, which is why I advise against any purchase. A call to support ended in the recommendation to change the batteries of the mobile phones - complete nonsense. I also have a lift between the devices - but the fact that the network extension does not work is not due to the lift but to the miserable quality of the device.