... Chipset 3).Small size low engergy bluetooth pcb module 4.0 Bluetooth Module can be applied to kinds of electronic ... a pair of Bluetooth RS232 module, the process will be completed automatically. Features:* Bluetooth 4.0* On-board antenna ... interface* Support multi baud rate(such asl.2k, 2.4, 4.8, 9.6k, 19.2k, 38.4k, 57. ... authentication, data encryption.Photo: low engergy bluetooth pcb module 4.0