OPU-4 PW is a robust, flush-mounted enclosure made of white ABS plastic. Due to its aesthetic appearance, the enclosure can be installed in prominent locations within usable indoor spaces. Its neutral design and generous dimensions allow for the installation of SATEL control panels, their expansion modules, communication modules, controllers, and a variety of other devices inside the enclosure. OPU-4 PW is equipped with double tamper protection against opening the enclosure and detaching it from the wall.

The enclosure provides ample space for the installation of 40 VA or 60 VA power transformers and can also accommodate a 7 Ah, 12 V emergency battery. Since it neither blocks nor dampens the radio signal, wireless devices, including their antennas, can be installed inside the enclosure.