The DP-0252P has 3 internal replaceable components. The main component being the companion board, this board has the mic soldered to the board and is called a 300-003. The speaker used is a 38mm speaker called a 280-002. The button used is called a 280-004. All of these components can be ordered directly from our technical support department via “component replacement”. Please be aware these are not components available for purchase from any distributor, you must contact Channel Vision directly for purchase.