The document describes and provides specifications for several air purifier models from Crusaders, ranging from Rs. 12,990 to Rs. 80,000. Key features included are PM 2.5 sensors, HEPA filters, activated carbon filters, UV lights, negative ionizers, and coverage areas from 30-100 square meters. Purifiers can be wall-mounted or free-standing, and include touch panels, timers, and remote controls. Models vary in size, power, number of filters, and price points to suit different budget and space requirements.