supply of automatic abs plastic air purifier , supply of automatic abs plastic air purifier (fragrance dispenser) with negative ion generat or, wall mountable and battery-operated, suitable for frequent passenger use in railway coach lavatories an d passenger seating areas. the dispenser shall be manufactured from durable, recyclable engineering plas tic, with tamper resistant lockable cover. it shall operate on non-aerosol, fuel cell or equivalent advanced te chnology, designed to provide continuous and uniform fragrance release for 24 hours a day, with cartridge options for minimum 30/60/90 days life. the unit shall operate noiselessly, without moving parts, and be co mpatible with standard aa alkaline batteries. malodor neutralization system shall be provided using proprie tary or equivalent advanced technology. each unit shall be supplied with one cartridge refill and battery. it em should be in original oem packaging, along with manufacturers warranty certificate and authorization l etter from oem/authorized distributor. a sample shall be submitted to the consignee for approval prior to b ulk supply. accepted benchmark: oxy-gen pro/supreme or equivalent product from other reputed brand of similar technology, subject to purchasers approval [ warranty period: 30 months after the date of deliver y ] ]