工业级设计 
                                    外置天线 
                                    PIN TO PIN BM77(工程师几乎零工作量替换） 
                                    兼容SPP（蓝牙3.0~2.1）和GATT（蓝牙4.0）协议 
                                    支持主端（master)和从端(slaver) 
                                    支持UART通信,可变波特率 
                                    支持CDM命令修改和读取蓝牙参数 
                                    ARM Cortex™-M3处理器 
                                    卓越的接收灵敏度 
                                    15mm(L) x 12mm(W)  
                                    支持 OTA 
                                    支持蓝牙class2标准 
                                    符合ROSH标准