With Smart LED Letters, light up and brighten up your words, your messages, your notices. It is now easy to create your own words by clipping on different letters to each other. Just collocate letters to create your own words, disassemble and collocate again and again easily. Hang it up, put it on your counter, attach it to your window or door. Smart LED letters offer: affordable and practical application, environmental solution. Important: In order to operate Smart LED Letters below items (SKUs) must be ordered separately: Power Supply: US Plug SKU No: ULDLAR3020X2000 LED Flash Control: SKU: ULDL0RF000X2000 Spacer: SKU: ULDL0RC033X2000 Red End Caps: SKU: ULDL0RT000X2000