... , easy to handle 3) Double lamp changer overhead projector with fresnel lens Features:1,Full function, much lighter and economical for ... ,CE certificate issued by ETS3,Plastic body case4,Anti-glare fresnel lens to protect user’s eyes5,Separate power cord case6 ... off assure safety power lock when cover open9,Hi-low light switch economically prolongs the life span of lamps10,Quick lamp ...