Panasonic KX-TGA400B or KX-TGA200B Rubber Keypad THIS PANASONIC PQSX10124Z SWITCH WORKS WITH MANY PANASONIC CORDLESS PHONES. Works with the following models: Panasonic KX-TG4000B, Panasonic KXTGA200B, Panasonic KX-TGA400, Panasonic KX-TGA400B