TOOGOO(R) Replacement 4 Button Remote Car Keyless Entry Key Fob Case Shell Pad for Ford/Lincoln/Mercury This item isn't a remote key and it is just a remote key shell case replacement. Not electronic internals. Best replacement for a key with broken buttons or worn key case. There is NO interior (remote/electronics/transponder chip)unit inside. Just cut the key blade,take the internal electronic(include immobilizer/transponder chip) from original remote and place them to our key shell,then you are ready! Give you long lasting, heavy-duty support.