It is not programmable, but the logitech k860 is nearly a drop-in replacement. I say 'nearly' because it's using scissor switches instead of membrane. The form

It is not programmable, but the logitech k860 is nearly a drop-in replacement. I say 'nearly' because it's using scissor switches instead of membrane. The form factor is otherwise the same including the optional footrests being in the correct spot.