Ideal if you need more keys. This one has 0-9, asterix, #, A, B, C, D - 4 x 4 way matrix.Specifications:Contact rating: 20mA, 24VDCContact resistance: 200maxLife: 1,000,000 cycles per keyContact: Conductive rubberSize (Key Face): 65(W) x 59(H) x 7(D)mmColour: White keys on black background.