easy to change picture,pure acrylic, LED long lifespan, eco-friendly, ultra slim, energy saving Snap-Frame Light BoxKM-F29Profile: Extruded AluminiumFinish: Anodizing silver/Black paintedLight source: LEDLife Span: LED above 30000 hoursFrame Style: 4-side snap frameRating: Indoor onlyOptions: Single side &double side LED Magnetic Light Box