... security detector 2,Higher sensitivity 3,Modern contour design 4.Soild wood material 5.Anti-theft device em library security gate, em library security system ... Model: SSLT-EM-9188 NEWDescriptions:* Material: High quality transparent Acrylic, no deformation, no color, wear-resisting. * Way of alarm ... 1500mm x 400mm x 25mm Weight 20kg/pce SSLT em security system for library