LED strip in the base illuminates an engraved acrylic plate & is powered by a low-energy USB adaptor. Insert the acrylic plate into the wooden base & turn it on. It is easy & simple to put together this led sign. Engraving in the acrylic plate will be white/transparent when it’s off. Turning it on it will have multiple color choices. This led sign has 7 color moods: red, blue, green, pink, turquoise, yellow, & white. It also has 3 different automatic color-changing modes. Each base has a long USB cable & mode/brighter/darker buttons. Use your own USB mains plug or plug within your computer or other USB port. LED Sign: The base is made from solid beech wood. Measures: 150mm (5.90 inch) x 44mm (1.73 inch) x 29mm (1.14 inch) height. Slide measurements: 1) 180mm (7.08inch) wide x 100mm (3.93inch) height x 5mm (0.196inch) thickness. 2) 180mm (7.08inch) wide x 150mm (5.90inch) height x 5mm (0.196inch) thickness. 3) 240mm (9.44inch) wide x 120mm (4.72inch) height x 5mm (0.196inch) thickness. The power lead measures 1.5m (4.92 ft) What comes in the box: 1x Acrylic slide. 1x LED sign base. 1x USB power lead (power adapter not included). Cleaning Acrylic Sheet! Soapy water is the safest & most effective cleaning solution for acrylic. Use a non-abrasive lint-free or microfiber cloth that won’t scratch the surface. Acrylic sheets can be damaged by harsh solvents & cleaners. Ramen Bowl, Bowl Anime, Sign, Neon Personalized Japanese Light, Noodles Led Light