Part No. starting with ST51xx are the keypad only (also called "elastomere"). Best used to change a worn keyboard with the same variant. For switching the variant you need the kit (ST5xxx), which includes elctronic-board and cable.
Changing the keypad is easy, disassembly of unit is not needed.
Suits to all Omnii XT10, XT15 variants.
Genuine Zebra factory new product, in stock, ready to ship.