* compatible with V 1.2 or 2.1+EDR criterion
* class 2 standard
* on-board antenna
* effective distance 10M
* standard UART interface
* support multi-band rate
* energy saving automatically
* support low consume function mode
* reference designs available at no additional cost
* high-speed function model
* security authentication, add code for data
Class 2
With on-board antenna and PIN
BC04 CSR Chipset
SIZE: 31.1*17.7*1.82 MM

Realized agreement
* Realize Bluetooth serial profile.
* LM, LC, L2cap, SDP and RFCOMM

Pin specification:
1. Clearup saved Bluetooth address(input)
2. Connect instruction output high level under connection(output)
3. Clearup transmission(input)
4. Request transmission(output)
5. Serial data input
6. Sleep/awaken(input), connect high level when it is free
7. Do not connect
8. The source of power supply
9. The pressure of electrical source(input)