Easy to use without any experience in Bluetooth stack application. User interface uses universal serial port design, full-duplex two-way communication, minimum baud rate support 9600 bps. Default connection interval is 30 millisecond, fast connection. Support 2M symbol transmission. Support 244 bytes packet transmission. Support AT instruction for software reset and get MAC address. Support AT instruction to set Bluetooth connection interval and control different forwarding rates (dynamic power adjustment).