PASO was founded in 1973 by managers and technicians from the historic Milanese audio manufacturer Geloso, and develops and builds its voice alarm and sound-diffusion equipment in-house at Lainate. Its PA8500-VES and PAW integrated voice evacuation systems are certified to EN 54-16:2008, the PA8506-V product page publishing certificate 0068-CPD-081/2011, and the systems are also declared compliant with ISO 7240-19 and EN 60849. The range is completed by loudspeakers certified to EN 54-24 and battery charging and monitoring units to EN 54-4. The company additionally runs a maintenance-technician course for fire and evacuation systems.