Keyboard Matrix allows you to quickly add controls to your electronics projects It provides numbers from 0 to 9, as well as standard star (*) and hash symbols Communicates easily with any microcontroller Direct replacement, a simple plugs and plays with no wire splicing Keyboard matrixes allows you to quickly add control to your electronic project Name:12 Key Keyboard Module Model: Monolithic Keyboard Applicable products: Industrial keyboard module row and column scanning Colour:Black Material:Plastic Package Contents: 3x 4x3 Keyboard Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.