COLUMB 1D-12-4-N Description The Columbus loudspeaker and light signaling system is designed for use in emergency vehicles of the Ministry of Internal Affairs, the Ministry of Emergency Situations, the Ministry of Defense, the Ministry of Health, and other ministries and agencies. The system is certified for compliance with the Technical Regulations of the Customs Union TR CU 018/2011 "On the Safety of Wheeled Vehicles," approved by the Russian Federation. This modern, low-profile system (no more than 79 mm) is controlled by a microphone. It features a one-piece aluminum housing and a polished stainless steel grille. Shades made of impact-resistant polycarbonate with added UV stabilizer.