Features: There are two kinds of 4*4*4 3D LED Light Squared the one LED only display blue color the other can display two color. 1: Bi-color LED is 3 feet single color is 2 feet ! 2: If you buy the only blue LEDThe hole of the board "R+" dose not connect. Specifications: Service voltage: 5V PCB size: 71*73mm LED Light Color: Blue Blue !#!amp!*! red Net weight: Approx. 83g Package includes: 1* PCB board 1* Other Accessories