The LED signal towers LD6A from IDEC feature an exceptional oval design. Unlike conventional signal towers where the translucent domes are stacked directly on top of each other, the LD6A series separates them with non-transparent plastic, which, along with special lenses that provide triple light refraction, enhances the visibility of the signal states. It is also possible to label the individual signals in the gaps. The base modules are available with a flashing light function and an acoustic alarm. Two different alarm signals can be selected, and their volume can be adjusted using a slider in the range of 70 to 90 dB. The LD6A series can be combined in the following configurations: frame mounting, wall mounting, floor mounting, and pipe mounting.