... Bluetooth device again. The parameters can be set according to the actual use occasion, the files can be sent according to receiver ... files c.*.3GP animation, d. *.txt, e.*.MP3 audio files, etc.4).Content may be updated via the following ... link control,L2CAP, SDP, RFCOMM, OBEXApplications: Shops and shopping malls Coffee bars, restaurants,clubs Airports, bus station Bluetooth Advertisement Transmitter