The TWA45 is an electronic four-way LED signalling wall-mounting element manufactured by QLIGHT. It features four red and yellow LED indicators, a plastic material body with a white finish, and a switching power supply. It is equipped with an internal buzzer for audible warning and an output relay for connecting external equipment and for obtaining remote control operation. Additionally, the Signallers accessories also include two supporting brackets for easy wall mounting and two screws for installation.