Unit only two years old, manufactured by Sperian, powered air chemical respirator for use with agricultural chemicals. 12 volt rechargeable batteries, fully enclosed face shield with chemical free filtered air. Protects whole face and you can leave your glasses on. Face shield will tilt up whilst on your head, like a welding mask. Two types of respirator cartridges available, tear off face shield covers also supplied in case of splash back. Battery charger and filter test plate included. Bought in Australia and all parts and cartridges available readily, unit completely functional, job done now surplus to requirements. New replacement cost $1000 plus gst.