A FM transmitter and charger assembly includes a primary member, a FM
transmitting device, and a securing member; audio signals in a MP3 player
can be transferred to, and transmitted by the transmitting device when
both the MP3 player and the FM transmitting device are connected to the
primary member while a radio can receive the signals, and play music
accordingly when it is tuned to the same channel as the transmitting
device; the securing member includes a hollow part for the MP3 player to
be closely inserted therein, and an engaging plate connected to a back of
the hollow part and capable of being detachably fitted onto the primary
member; thus, a certain primary member allows different MP3 players to be
securely connected thereto with the help of various securing members,
which have different sizes for suiting MP3 players with different sizes.