ITEM NAME:TM1638 8-Bit LED Digital Tube 16 Keys 3-Wire Display Module With 5 Cables.(1) Using TM1638 digital tube driver chip to drive common anode LED digital tube. 1 8-Bit LED Digital Tube 16 Keys TM1638 Display Module. 5 Cables (Random Color). Material: PCB Board. (4) 2 8 total 16 buttons.